Android phone can't be turned on. How to back up the SMS call records of contacts?

The Android system keeps restarting, or the display application has stopped running, and the phone can't be turned on. It is recommended to enter recovery mode for backup operation, and then perform erasure operation.

Wipe will delete all the settings of the mobile phone and all the installed programs and related files, and restore to the factory settings, that is, only the original state of the mobile phone will be obtained.

The backup and double erasure steps are as follows:

Turn off the appliances

Press the HOME+ power button to enter recovery mode.

Click "Backup" in the sixth line.

and

Restore "(backup and recovery).

Click "Backup" in the first line to start the backup.

Use the volume down button to select Erase.

Data/factory

Reset this.

Press the HOME key to perform erasure.

Data/factory

After issuing the reset command, use the volume down button to select Yes.

-

delete

all

user

Data and press the HOME key to execute the command.

Execute yes

-

delete

all

user

After the data command, it means to start execution.

Press the volume button to select Erase.

stash

Partition the command and press the HOME key to execute it.

Perform erasure

stash

After issuing the partition command, press the volume key to select Yes.

-

beat

Cache and press the HOME key to execute the command.

Execute yes

-

beat

After the Cache command, it means erase.

stash

Partition has also been successfully executed.

beat

Data/factory

Reset and erase

stash

After the partition is successfully executed.

choose

restart

system

at present

Just restart the system.