Sent from my C2105 using xda app-developers app
Try not to wipe cache and user data when flashing through Flashtool.
If you can't boot to system without wiping userdata, the best way is backup via Titanium Backup before unlocking bootloader.
If I'm not wrong, Internal SD wouldn't get wiped, only /data partition. But it's better to take backup of your Internal SD first.
I don't get what you mean about the "data" :|
Is it Contact, SMS, etc? Backup using My Backup/ My Backup Pro: https://play.google.com/store/apps/d...droid.MyBackup
App & Game? Backup using Titanium Backup
Ahh I see..
For system app backup, you need to restore it manually one by one, don't use batch action.
FC is normal for restoring system app, but after reboot, FC is gone.
If you want to move updated app from /data to /system partition.
You can use Batch action "Integrate update of system apps into ROM"
Again, it's normal if FC happen, just reboot your phone after finished integrating the update.