10
10.11 How to view the phone memory size? 86
10.12 Document can be classified by Files app? 87
10.13 How to view mobile phone related information? 87
11 Backup recovery and update 88
11.1 How to update your mobile phone? 88
11.2 Mobile phone fails to update. 88
11.3 What data will be deleted when restore factory settings? 88
11.4 How to restore factory settings? 89
11.5 How to get the latest software update package? 89
11.6 What data will be deleted after update? 89
11.7 What are the methods of backup and restore data? 89
11.8 How to backup messages to microSD card? 89
11.9 How to backup contacts to microSD card? 90
11.10 How to backup contacts, messages and other personal data to HUAWEI cloud account? 90
11.11 Local backup progress is stuck, the speed is slow. 90
11.12 Fail to receive the notification of OTA update. 90
11.13 How to completely delete all files on the phone? 90
11.14 How to return to the original version after update? 90
11.15 How to set up the system automatically detect and update software version? 90
12 Location service and GPS navigation 92
12.1 Is BEIDOU navigation supported? How to check the running state? 92
12.2 Navigation software location is slow or fails to locate? 92
12.3 How to activate GPS navigation? 92
12.4 How to use mobile navigation? 92
12.5 How to use off-line navigation? 93
12.6 What is Location Based Service(LBS)? 93
12.7 How to turn on Location Service? 93
12.8 Does location service consume data traffic? 93
12.9 Location service is not available. 93
12.10 Mobile phone prompts "Location Service error". 93
12.11 What is GPS? 94
12.12 Does mobile GPS charge fees? 94
12.13 Does mobile navigation need much data traffic? 94
12.14 How to save data traffic consumption during using GPS navigation? 94
12.15 Navigation infomation is imprecise. 94
12.16 GPS signal loss. 95
12.17 How does GPS work? 95
12.18 Difference between GPS location and mobile station location. 95
12.19 How to forbid applications to get personal location information? 95
13 Accessory 96
13.1 Accessory list 96
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