Give you some general methods to protect your mobile phone.
Mobile phones are highly sophisticated electronic devices. Unless it is a specially designed model, most mobile phones have poor dustproof and moisture-proof performance. Therefore, it is necessary to develop good habits in order to extend the service life of mobile phones.
1. It is recommended to use a mobile phone holster.
The leather case is equivalent to adding an extra coat to the mobile phone, which can reduce the damage of the mobile phone when it falls or meets water. However, it doesn't mean that the mobile phone is fireproof after it is covered with a leather case, but it won't pay attention when it is used and placed. On the contrary, consumers should be careful to avoid damage to their mobile phones.
2. Use the environment carefully
There are cracks or holes in the mobile phone. When it meets water vapor, it will easily penetrate, leading to corrosion of the circuit board, so consumers should never use their mobile phones in the rain or in the bathroom. With the passage of time, the corrosion of circuit board by water vapor becomes more and more serious. At first, it may feel useless, but when the fault phenomenon appears, I'm afraid it's too late. Pay special attention to moistureproof in rainy season.
3. Pay attention to handling methods
Everyone carries a mobile phone in different ways, but some ways are easy to increase the chance of mobile phone damage. For example, some young people are used to putting their mobile phones in their pockets next to their pants. If they sit down carelessly, they will be crushed, or they will be squeezed to the ground when they walk, which will damage their mobile phones. In addition, like a light and small mobile phone, some people are used to putting it in their chest pockets, but they don't know that if they bend down carelessly, the mobile phone will fall to the ground.
4. Carefully select small pendants.
At present, there are many kinds of small ornaments on mobile phones in the market. Pay more attention to the adhesion of trinkets when buying, and avoid going out with a beautiful trinket's mobile phone, flying directly with it, and then having to go to a repair shop for repair.
5. Be careful when upgrading cold light.
Many consumers will replace their mobile phones with cold light display screens. There are two ways to deal with it. One is the high-voltage cold light produced by boosting method, but if the circuit is not handled properly, it will produce noise during the call. Another way is to replace the blue high-brightness LED, but if the welding process is not good, it will easily lead to machine burning, so consumers should be cautious if they want to upgrade the cold light, so as not to lose their wives and lose their soldiers. (Xiao 7 didn't ~ don't watch)
Stay away from the magnet environment
The mobile phone speaker itself is magnetic, so don't let the mobile phone often touch places with a lot of iron powder, so as not to inhale too much iron powder into the sound hole of the mobile phone speaker and attach it to the speaker film, resulting in the sound of the mobile phone receiver becoming smaller or even inaudible.
7. If the mobile phone is accidentally immersed in water, please take out the battery directly and turn it off forcibly, instead of taking any other action to prevent the motherboard from being short-circuited in water.
8. When there is only one cell phone signal left, please don't talk on the cell phone, because at this time, the receiving signal of the cell phone is 1000 times stronger than the whole cell phone signal, which will cause great radiation to the body. As we all know, the electromagnetic wave of mobile phones has always been a worrying problem. However, the design of the mobile phone will enhance the electromagnetic wave emission intensity of the mobile phone, so as to maintain a considerable call quality in areas with poor reception. When the reception is full and there is only one cell left, the transmission intensity difference exceeds 1000 times. The electromagnetic wave intensity is as high as 0.6W (Watt). For your health, I suggest you check the number of frames received before using your mobile phone. Using hands-free receiver is also a good way to reduce the intensity of electromagnetic wave emission! )
9. Don't talk when the phone is charging, because there is a potential danger of current flowing through the phone.
10. Avoid touching the metal sheet of the SIM card. Any scratch or damage will make the SIM card unreadable.
1 1. Never put the mobile phone at the outlet of cold air, because the water vapor condensed on the mobile phone will corrode the machine board invisibly.
12, charging time should be enough, usually 8 hours is enough, if overcharged, the battery life will be shortened.
13, remember, please don't pull out the antenna of the mobile phone or play like a toy unless necessary, so as not to affect the reception (of course, there is no small 7).
14. If there are scratches on the screen of the mobile phone, you can try to squeeze some toothpaste on the wet rag and apply it to the screen of the mobile phone. You will find that the scratches fade obviously, and then wipe them with a paper towel or a clean rag, and the screen will be brighter. I haven't tried either. Not for the time being. Who tried to tell me if it worked, hehe!
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Save battery
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When the battery life of your mobile phone is shortened (memory effect or aging), wrap the battery in a newspaper, put it in a plastic bag and put it in the freezer for three days (the newspaper can absorb excess water); Taking out after three days, and standing at room temperature for two days; After two days, charge the battery and put it into the mobile phone for testing (estimated to save 80%-90%); When the power of the mobile phone is often cut off, or it will be dead soon after being fully charged, it only needs a small eraser to bring it back to life! After taking out the battery, clean the contacts (brass sheets) on the battery with an eraser and put them back on the phone. You will find that the battery is back to life!
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Rescue the flooded mobile phone (KF is recommended for too much water)
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The mobile phone was wet by the rain and accidentally fell into the water. If you are really unlucky, please don't hesitate to turn off the power immediately and take out the battery to avoid water droplets from corroding the machine board. Then send it to repair as soon as possible. This is an emergency measure. In addition, drying the moisture inside the mobile phone with a hair dryer (only warm air can be used) can also slow down the moisture corrosion of the machine board, which is also an emergency measure.
If you install the battery and continue to use it, it may still work normally at that time, but after half a month, the machine board you ignored will be corroded beyond redemption. The normal operation I saw before is actually just an illusion.
When you blow dry your mobile phone with a hair dryer, remember to set the temperature to a minimum. If the heat is too large, the rubber of the car body may be deformed.
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Rescue of automatic shutdown
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Many users have experienced the situation that the mobile phone will suddenly turn off automatically when it is fully charged and in standby state. The reasons may be as follows:
1. The protection circuit in the lithium battery is too sensitive, and the power will be cut off when the current is high.
2. The battery itself is aging,
3. There is dirt on the metal plate at the contact position of the battery, which leads to poor contact of the power supply.
4. The connection between the battery and the mobile phone is easy to loosen.
If you find the first two problems after inspection, you must go to the repair shop for repair.
But if it is the latter two items, the problem is only that the "battery metal sheet" is dirty and oxidized. As long as you clean it with a glue stick, the situation will get better. Putting paper or film between the battery and the mobile phone can also solve the problem of poor contact caused by loose battery. (You can also use an eraser to wipe the contact point of the battery brass sheet. )
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What do mobile phones fear most?
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The first fear: water and humidity;
Avoid using the mobile phone in humid environment (seaside/rainy day) to avoid a large amount of water vapor invading the circuit board to form water stains, resulting in short circuit or oxidized metal interfaces. Because if the charging hole is oxidized, it is easy to burn the machine when charging. Mobile phones should be used moderately to generate a certain temperature inside them and naturally evaporate the water vapor accumulated at ordinary times. And if the mobile phone is idle for a long time, it needs special moisture-proof treatment. Soak in water: what can still be alive and kicking after soaking in water? Sulfur: mobile phones should be avoided in places with heavy sulfur, so as not to aggravate metal oxidation.
Second fear: dust, grease:
The accumulation of dust will also affect the current conduction between circuit board contacts. Long-term use of the mobile phone panel, facial grease may penetrate into the fuselage, pollute the internal wiring and cause damage!
The third fear: heat and high temperature:
Mobile phones should avoid being exposed to high temperature. Especially in summer, it is easy to replace the circuit board or battery due to high temperature in the car, and the screen is also easy to be deformed due to material changes. Temperature difference: the temperature difference when the mobile phone enters and exits the air-conditioned room. The water vapor condensed by cold air may corrode the circuit board, causing short circuit of electronic components and affecting the life of the mobile phone!
The fourth fear: falling and collision:
Mechanical collision is easy to damage. Squeezing: The mobile phone is squeezed hard. Although the damage is not as direct as falling off the machine, some screens have black spots, mostly caused by the liquid crystal being squeezed and broken. Because the pressure that LCD can bear is quite limited, users must pay attention!
The fifth fear: electricity and batteries:
If the original battery is not used, the contact between the mobile phone and the battery is not as close as the original battery. Long-term shaking down may lead to contact relaxation and instant power failure.
[Charging]: Don't turn on the mobile phone when charging, so as not to affect the circuit board when the temperature of the mobile phone is too high. After the car is started, the car charger should be plugged in to avoid the instantaneous peak current flowing back to the mobile phone through the circuit and damaging the internal parts.
[Static electricity]: The human body is charged with static electricity. If the disassembly and assembly of the mobile phone is not carried out on a platform that can release static electricity, impurities carried by static electricity may invade the fuselage and cause short circuit.
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Mobile phone loss and its countermeasures
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1. Report the loss immediately. Call 10086, tell her your service password and ask to stop.
If you lose your mobile phone, all your contacts will be exposed to others. Therefore, in order to prevent fraud and other behaviors, when you get the card, you should quickly inform your contacts through various channels that your mobile phone has been lost. Please don't trust any remittance, recharge and other information.
3. Many mobile phone applications, such as Gmail and QQ, automatically log in by saving passwords. When your mobile phone is lost, you should immediately change the login passwords of these applications to prevent further loss of personal privacy.
4. Make up the card quickly. Based on the first point, if you don't know that your service password can't be stopped, take your ID card to replace it quickly, so as to avoid the loss of your phone bill caused by the long-distance call made by the person who found the mobile phone. Based on the second point, you need to inform your contact person in time, and you should also replenish your card in time.
Should nip in the bud, do:
1. Take as few photos (such as nude photos) that involve privacy as possible. If yes, transfer it to the computer as soon as possible, store it in a safe place, and delete it on the mobile phone to prevent the accident of losing the mobile phone.
2. In order to prevent the lost mobile phone from being cheated, try to avoid storing contacts with names such as "home", "father", "mother", "brother" and "wife", and save them in real names.
Please remember your service password. In order to stop the phone as soon as possible after it is lost, you must master your service password at any time. If you don't know yet, you can use this machine to send the short message code "HFMM ID number" to 0 186 1 to reset the customer service password.
4. Keep the SIM card information corresponding to the ID card information, and ensure that in case the mobile phone is lost, it can be stopped and replaced in time without a password.
5. Back up your contact information regularly to prevent it from being lost. There are generally two ways: 1. It is very convenient to backup to a computer through PC-side software, such as Nokia's PC suite; 2. Back up to the server through network services, such as Monternet directory. The housekeeper can synchronize your contacts to Monternet with one click.
6. Set the boot verification PIN card for the SIM card. So your SIM card can't be used after someone else turns it off and turns it on again. For specific supported mobile phones, you can set the phone power-on password. For specific supported mobile phones, you can also install anti-theft software, and when others change their SIM cards, you can still automatically send text messages to inform your original number. But this feeling is useless, because if the police can find the lost mobile phone, then you really overestimate our people's police.
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Politeness rules in the use of mobile phones
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general rule
1. The purpose of the code is to maintain the relationship between people affected by modern communication technology, and at the same time protect your personal safety.
2. This code is suitable for people with and without mobile phones, and they can read the following words.
3. The code has no legal effect, only the first constraint, but it does not rule out that it will have legal effect in the future.
First pick-up status
Explanation: not to pick up the plane, but to pick up the mobile phone.
Rule 1: When the phone rings, please answer it as soon as possible.
Comments: Don't touch, don't gesture, and don't drag the bell into noise.
Article 2: Give your name before answering the phone.
Comments: Playing your guess game is even weaker than playing your guess on a wired phone.
Rule 3: If you have to answer the phone while talking to someone, please say, "Sorry, I'll answer the phone first."
Comments: Even if you are a handsome guy, a beautiful woman or an officer, you can't suddenly leave people hanging.
Article 4: Be lenient with people who dial the wrong number.
Comments: Although you waste fifty cents, don't call him "psycho".
Article 5: It's dangerous to turn on your mobile phone!
Comments: Besides ears, mouth and eyes, hands and feet can't be idle. Put on the speakerphone as soon as possible, or you will be fined by the police sooner or later.
The second article shutdown state
Note: turning on the phone is the basis of conversation, and turning off the phone is the basis of politeness.
Rule 1: Please turn off your cell phone during the meeting.
Comments: When someone has a meeting with you, you should wait for you to have a meeting with him on the phone first. How to hold such a meeting?
Article 2: Please turn off your mobile phone when watching movies and listening to concerts.
Comments: Everyone spends money queuing to buy tickets to watch professional performances, and it's not your turn to get involved.
Article 3: Please turn off your mobile phone when going to the hospital or flying.
Comments: Life is a matter of concern, unless you want to commit suicide.
Article 4: Please turn off your mobile phone in the library.
Comments: It's inappropriate to speak, why use a mobile phone? Besides, everyone is quiet. Is it appropriate for you to make a sound?
Article 5: Please turn off your mobile phone during the speech and ceremony.
Comments: Everyone, please use your ears to rest your mouth!
Article 3 Feeding state
Description: "Hello", "Touch the west" and "Can you hear me clearly?" It also applies to this article.
The first rule: the volume of "Hello" can be heard within 3 meters in diameter.
Comments: If you can't handle it, please close the door and practice hard for a hundred times.
Article 2: When the signal is not strong, please "feed" for three times at most, and please give up.
Comments: Three times is not enough, give up!
The fourth random state
Note: marry a chicken and follow it, and buy a machine at random.
Rule 1: bring your cell phone with you when you turn it on.
Comments: people ran away, and the mobile phone squeaked on the table, making everyone roll their eyes.
Rule 2: Keep your mobile phone where it is easy to get.
Comments: Don't let the phone ring, rummage through everything and look everywhere. Found it. It's broken.
Article 3: Answer your mobile phone.
Comments: family and friends are not allowed to be operators, let alone answer other people's mobile phones.
The fifth chapter ringing state
Note: I heard the bell myself, and so did others.
Rule 1: Please don't call at an inappropriate time.
Comments: If people don't let you go straight, it's polite to hear "Happy Birthday" music at the funeral.
Rule 2: Turn up the volume so that you can hear it.
Comments: Almost everyone has a mobile phone, so there is nothing to show off.
Article 6 Love and Dedication
Explanation: Caring is more valuable than politeness.
Rule 1: Friends and passers-by are in trouble, and mobile phones help.
Comments: A mobile phone that can help people get out of trouble is better than a seven-level pagoda. (Our forum is also like this ~ ~ Hehe)
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Calculation of battery life and charging time of mobile phone
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Service life of mobile phone battery
The service life of mobile phone battery is not calculated by years, but by the number of times of charging and discharging. Nickel-cadmium batteries can generally be charged and discharged 100- 150 times, hydrogen casting batteries can generally be charged and discharged 200-300 times, and lithium batteries can generally be charged and discharged 350-700 times. The longer the interval between each charge and discharge, the longer the battery life. Therefore, when consumers use the battery, it is best to use up the battery before recharging.
How to calculate the charging time of mobile phone
Mobile phone battery is a headache. People often ask how long the battery of a mobile phone should be fully charged. Is there a calculation method? Now tell you a simple calculation method. (Note that this method is not applicable to new batteries)
Generally, the battery capacity is expressed in mA, and the larger the value, the greater the capacity. For example, 1200mAh means that the battery capacity is 1200mah. The length of charging time is related to the charger, generally marked with charging current, also expressed in milliamperes. The charging time is calculated by dividing the battery capacity by the charging current of the charger, and then multiplying by the coefficient 1.2. For example, the capacity of the battery is 1200mA, the charging current of the charger is 600mA, (1200ma/600ma) *1.2 = 2.4 hours, and the charging time of this battery is 2.4 hours.
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Mobile phone SIM card knowledge
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Compared with analog mobile phones, digital mobile phones have an additional SIM card in structure. SIM card is called subscriber identity card. It is actually a smart card with a large-scale integrated circuit, which is used to register important data and information of users.
The data stored in the SIM card can be divided into four categories: the first category is the data stored in a fixed way. This kind of data is written by SIM card center before the mobile phone is sold, including international mobile subscriber identification number (IMSI), authentication key (KI), authentication and encryption algorithm, etc. The second category is temporarily stored network data. Such as location area identification code (LAI), mobile subscriber temporary identification code (TMSI) and public telephone network code without access. The third category is related business codes, such as personal identification number (PIN), unlocking code (PUK), billing rate, etc. The fourth category is the phone book, which is the phone number entered by mobile phone users at any time. Almost all the user's data are stored in the SIM card, so the SIM card is also called the user data identification card.
One of the most important functions of SIM card is authentication and encryption. When a user moves to a new area to make or receive a call, the switch must authenticate the user to determine whether it is a legitimate user. At this time, both SIM card and switch use authentication algorithm to calculate authentication key and 8-bit random number. If the calculation results are the same, the SIM card is identified, otherwise the SIM card is rejected and the user cannot make a call. SIM card can also use encryption algorithm to encrypt voice to prevent eavesdropping.
Digital mobile phones can only be used after installing a SIM card, otherwise they are just "bare metal". When the SIM card is inserted into any mobile phone that meets the specifications of the digital mobile phone system, it can receive and make calls. Call charges are automatically charged to the cardholder's bill, regardless of the mobile phone.
In order to prevent the mobile phone from being stolen after being lost, each SIM card can be set with a password, that is, a personal identification code (PIN code), which is used to lock the SIM card. It is set by users themselves and can be changed at any time. Only when the user enters the correct password can the mobile phone enter the normal use state. If the wrong personal password is entered three times in a row, the phone will lock the SIM card. To unlock, you must use the unlock code. If you forget this number, or the SIM card is lost, you need to take all the account opening materials and fly to the local wireless business hall to unlock or report the loss.
SIM cards can be divided into big cards and small cards. A big card is as big as a magnetic card, and a small card is as small as a nail, but the functions are the same (in fact, the use parts are exactly the same).
How to use SIM card correctly
SIM card is used to store digital mobile phone numbers and related information. Pay attention to the following points when using SIM card correctly:
Please don't bend the card, especially the metal contacts on the card should be carefully protected, and don't frequently insert and remove the SIM card from the mobile phone. .
The metal contacts on the card should be kept clean to avoid dust pollution.
Avoid placing the SIM card at a temperature below -20 degrees Celsius or above 85 degrees Celsius.
SIM card is only suitable for digital mobile phones that are allowed to access the network, otherwise the card may be damaged.
Common causes and solutions of SIM card failure;
SIM card is not inserted correctly, so it needs to be inserted correctly.
The metal contact is damaged, so you need to change the card at the operator.
The contacts on the SIM card and telephone are not clean, so they need to be cleaned with anti-static cloth.
SIM card should not work in the environment above 80℃ or below -35℃; In addition, please turn off the power of the mobile phone before removing or inserting the SIM card.
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About cell phone radiation
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Preventing the harm of mobile phone radiation to human body is a topic that many manufacturers selling mobile phone radiation protection films and radomes are talking about.
Radiation standard
Is the electromagnetic radiation of mobile phone antenna really harmful to human body? At present, there is no test to prove its harm. 65438+At the beginning of February, a test result released by western countries thought that electromagnetic wave radiation could improve the reaction ability of human brain.
Of course, this is not the conclusion.
The problem lies in the standard of radiation.
1. About the excessive radiation of mobile phones: At present, there is no radiation standard for mobile phones in China, nor in other countries in the world, and European and American countries have just begun to formulate it.
2. The statement of exceeding the standard is likely to intentionally confuse the concept of standard.
Regarding electromagnetic wave radiation, there are two standards in China, one is health standard and the other is occupational standard.
Hygienic standard is environmental standard, that is, the continuous radiation of electromagnetic waves in people's living environment for 24 hours does not exceed 40 μ W.
The professional standard means that the continuous radiation of electromagnetic waves in the working environment of staff does not exceed 50μw within 8 hours.
These two standards are continuous standards, and cell phone radiation is a matter of minutes or moments during the call, and cannot be applied to each other.
electromagnetic wave
The standards of electromagnetic radiation vary greatly from country to country.
China's standard is 40-50 μ W. ..
The standard of the former Soviet Union is10 μ w w. The American standard is10000 μ w.
The reason for this huge difference is not that Americans have special tolerance for radiation, or that they don't care about birth, illness and death, but that there is no evidence to prove the harm of electromagnetic waves.
In modern society, we live in a world full of electromagnetic waves. Computers, telephones, electric lights in the office, televisions, game machines, microwave ovens at home, outdoor and working environments, institutional equipment and wires all produce electromagnetic waves to varying degrees. There is no environment without electromagnetic radiation. In many office situations, the environment below 50μw does not exist. If we take the problem of electromagnetic radiation too seriously, there will be no pure land from which we can escape.
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Health problems of using mobile phones
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Although so far, the harm of electromagnetic radiation from mobile phones to human body has not been fully confirmed? But it never hurts to concentrate.
1. Don't use inferior mobile phones. When choosing a mobile phone, first, you must have a network access license. Most of the mobile phones that are not marked with permission signs are smuggled mobile phones that are not safe enough; Second, looking at the price trend, those mobile phones whose prices have dropped sharply are likely to fail the microwave radiation index.
2. Select qualified electromagnetic wave protective cover for mobile phone. At present, there are many kinds of mobile phone protective covers on the market, which can reduce microwave radiation to some extent. We have tested a certain brand of electromagnetic wave protective sleeve, and the anti-microwave efficiency is about 80%, which has no effect on the quality of mobile phone calls. In order to nip in the bud, new and old mobile phones should be equipped with electromagnetic wave protective covers.
3. Let the transmitting antenna of the mobile phone deviate from the head as far as possible. When answering the phone, the top of the transmitting antenna (or rod antenna) should deviate from the head as far as possible, and the antenna should be lengthened if possible. At the same time, when using the mobile phone, the mobile phone should not be close to the face, preferably 3-5 cm away to reduce the harm of microwave radiation.
4. Minimize the frequency and time of use. The more times you use your mobile phone, the more microwave radiation you get. Experts suggest that you should not use your mobile phone more than 10 times a day. If you have an ordinary phone, try not to use a mobile phone. The function of microwave radiation on the body is mainly to cause functional changes. When the microwave radiation disappears, the human body will adjust its function and return to normal. If the exposure time is too long, it will be more difficult to recover. Therefore, when using a mobile phone to talk, make a long story short and try to shorten the use time.
5. Pregnant women should not use mobile phones. It is found that the micro microwave radiation leaked from mobile phones can lead to the malformation of developing chicken embryos, but there is little research on the influence of microwave radiation from mobile phones on fetuses. However, scientists are worried that the microwave radiation leaked from mobile phones will have adverse effects on the fetus. Therefore, it is recommended that pregnant women do not put their mobile phones at their waist, and it is best to stay away.
6. It is advisable to supplement foods with anti-radiation function. In order to enhance radiation resistance, foods rich in high-quality protein, phospholipids and B vitamins should be supplemented in the diet, such as lean meat, milk, beans, poultry, fish, eggs, carrots, rape, kelp and cabbage.
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Complete handbook of mobile phone batteries
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How to save electricity
1, try to turn off the lighting of the display screen (if possible), and try to use the mobile phone in a bright place in the season with long nights and short days. Generally speaking, you can choose to turn off the lights on the display screen or connect the buttons to save electricity.
2. Turn off the cell phone in the coverage edge area, because the cell phone network signal in the coverage edge area is weak or even unavailable. Therefore, it is a waste to turn on electricity in this marginal area. If you need to use it, you can open it in a strong signal area, saving electricity and connecting quickly.
It is best to use the vibration function when you bring your mobile phone in cold weather. When the temperature is low in winter and spring, people wear thick clothes. If they take their mobile phones outdoors, the incoming ringtone is often difficult to hear, which makes the ringing time long and the connection rate low, resulting in the battery of the mobile phone wasting power.
4. Use it less outdoors or in cold places. Generally speaking, the adaptive temperature of mobile phone batteries is 10℃-40℃.
5. Use a short telephone ring in a quiet place. Generally, mobile phones have the function of long and short ringtones, so when you use them in a quiet place or in an environment where you are afraid of interference, you should enable shorter ringtones, which will save electricity and reduce the interference to the environment.
6. Digital mobile phone speaks in power saving mode. Most models of digital mobile phones have advanced functions of DTX discontinuous transmission power saving mode. In order to save electricity, the power of transmitting radio waves can be reduced when the mobile phone is temporarily in a non-talking state. The actual measurement proves that DTX power saving mode can prolong the call time by 30% ~ 50% at most.