2. Back up mobile phone data; (DM can be used for backup here, and other third-party BlackBerry software can also be used for backup. )
Turn on DM,
Step 2, click Backup and Restore.
Then click advanced,
On the right is the database. Click what you want to back up, and then click the left arrow to back up. Similarly, if you need to read the backup, click the file on the left and import the backup into the database on the right! ! The method is simple. You can also use other third-party software for backup according to your personal needs.
3, before installation, you can slim down the OS (some models don't need to slim down if they have large memory, such as 8900, they don't need it. Like 83,9000, you have to go through slimming steps to make your mobile phone run faster.
4. If the OS is completely installed or upgraded, just run DM directly; If it is a downgrade, please delete or rename Vendor.xml in the folder C: \ Program Files \ Common Files \ Research in Motion \ AppLoader First; (In general, I don't delete the tutorial Vendor.xml, but I usually rename it, because in the same JAVA, more OS packages may be installed in the future, so I don't need to delete it, just rename it directly, but it is also based on my personal preference.
5. Download WIPE, and connect the BlackBerry to the computer to run WIPE (this step is equivalent to formatting)-(In this step, there are many options for WIPE tools. I usually want a saber, commonly known as BBASK, because this function is more, it is not a special WIPE tool, so I don't elaborate on the WIPE tool here, it is very easy to download, and it is also a lot of third-party software.
6. If successful, after the BlackBerry restarts, you will see the following screen with the word 507. If it is not successful, please go back to step 5 and start again. At this time, please keep BlackBerry connected to the computer;
7. The first step, as we have already said, before downloading DM and the corresponding OS, I think a professional kerosene and berry control DM is essential, as well as ROM, which you can download at my address.
First, open your installation file, that is, when you download the operating system and unzip it into a folder, this picture will appear.
You can choose which version to use according to your own needs. Generally, the East Asian version is in Chinese.
8. There are two options for the next step. First, you can streamline the installed operating system. At this time, there are two situations;
The first situation is not to lose weight,
The second step is to lose weight. After entering C: \ program files \ common files \ research in motion \ shared \ loader files \, search your JAVA folder, and a lot of bottom COD will appear. At this time, you will start to lose weight and delete it.
Then you can start brushing the machine. If you want to answer by hand, you can hi me if you don't understand.