User's Manual

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4.16 Developer Options
You can set desktop backup password, unlock the screen, the SD card read and write
protection, USB debugging and other different applications.
4.17 About Phone
View phone's current signal, power, service status, the phone's software and hardware
information.
5 Common Problems & Solutions
If an exception occurs while using your phone, please refer to the following table to
troubleshoot
Common
problems
The causes
The solutions
Poor signal
Using the mobile phone in poor
reception area, such as nearby
Try to avoid