Nowadays, mobile phones are updated faster and faster, and many people leave their old mobile phones idle, but in fact, these old mobile phones can still exert their residual heat in many ways. Explain in detail how to make full use of old mobile phones. 1. Making a surveillance camera It is very convenient to set the mobile phone as a surveillance camera, and it can also save the cost of buying a camera, without worrying about the problem of expired or broken. In addition, placing surveillance cameras at home can also facilitate the monitoring of people with potential safety hazards. The specific operations are as follows: ① Download and install monitoring software. If you want to monitor with an old mobile phone, you must download the appropriate monitoring software. Android can search for the keyword "ipcam" to download, and Apple can download the application of "Manything" or "Video Streaming at Home". (2) After downloading and installing the monitoring software, the connected devices need to be connected to the network. You can use the data of the mobile phone to connect to wifi, and then install monitoring software on the target mobile phone and connect it to the same wifi with the host for debugging. ③ Installation Settings Set the shooting direction of the camera, adjust the distance and angle, and then insert the mobile phone into the charger for fixed placement. 2. As a smart home hub, transforming the mobile phone into a smart home hub can control smart home devices, such as temperature, lighting and music. At the same time, the smart home central system can be linked with all household appliances to complete the task quickly and efficiently. The specific operations are as follows: ① After downloading and installing the smart home software, install it, install it according to the instructions recommended by the software, and connect various home devices. ② When connecting devices use old mobile phones as smart home hubs, it is necessary to pay attention to networking the old mobile phones with home devices, and remote control can only be realized after Unicom settings are completed. ③ Intelligent control When the mobile phone is the hub of smart home, it can control the home equipment through voice control and remote control of mobile APP to realize intelligent control. 3. Build a monitoring network. If a family group owns many old mobile phones, they can link them to form a shared platform and participate in it. For example, set up family groups, monitor mutual assistance, record the lives of family members and share their lives. This is especially important for some families who need to spend time together. The specific operations are as follows: ① Download and install monitoring software. In order to connect old mobile phones, you need to search and download monitoring software first, such as downloading "IP webcam" of Android system and "Manything" of iOS system. ② Connect the device to the same WIFI, and realize the linkage of cameras through software debugging. (3) Set up monitoring network and family group, integrate networked cameras, and realize the formation of monitoring network or family group, which is not SameIPshare.com, and make unremitting efforts to avoid the occupation and access restriction of equipment resources with the same IP or the same name. 4. Used as a backup mobile phone In fact, using an old mobile phone as a backup mobile phone is the most common and practical method. Compared with the main mobile phone, the spare mobile phone has almost no pressure, so it is convenient and quick to make a spare mobile phone anytime and anywhere. When using an old mobile phone as a backup mobile phone, you can set up and bind home smart devices, safe work records, fund management and other apps, which will help you better manage your daily life. At the same time, in order to prevent the battery power consumption from being too fast, the power saving mode can be turned on appropriately to prolong its service life. 5. Make a pure version of the learning machine. Replacing your old mobile phone with a pure version of the learning machine can make you study and entertain better. Use its OS to slim down and become a smaller and lighter learning and entertainment device. The specific operations are as follows: ① Install Slimming: First reset the old mobile phone, then install Slimming, uninstall uncommon applications and system functions, and only keep the necessary functions. (2) Add applications to mobile phones, such as Baidu Library, Netease Cloud Classroom, and major novel applications. ; Add some portable entertainment applications, such as WeChat, Aauto Quicker, short video app, etc. This can not only meet the learning needs, but also relax and entertain. Donate old mobile phones to people in need or charities to contribute to society. In addition, in addition to the above methods, we can also use old mobile phones as the expansion screen of notebook computers, and plug-in storage devices even use old mobile phones for chip research. To sum up, the above are several ways to use old mobile phones, among which smart home hub, monitoring camera, monitoring network, family group, spare mobile phone, pure version learning machine and so on are recommended. Different from the previous articles on popularizing B-end market and product positioning, we deeply analyzed the potential value of idle old mobile phones from the perspective of consumer users, and some in-depth solutions and cases fully explained the value of the article. In the general direction of the values society, we should think deeply about materialization, and it is extremely necessary and valuable to improve the potential of our use of things.