You must install custom recovery first before you backup the rom if you have no custom recovery
HERE the guide.
If you have a custom recovery
- Off your phone now
- Hold power on + Volume up (for automatic download Quick Reboot then reboot recovery)
For CWM:
- Click Backup and restore
- backup
- Wait for loading
- Done! then Reboot device
For TWRP (2.8.2.0):
- Backup
- Check the Boot, system, and Data
- Swipe to Backup
- Wait it
- Done then Reboot
- Click System
For CTR: (v3.3)
- Backup/Restore
- Backup to /storage/sdcard1
- wait for loading
- Done! then Reboot Device
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Wednesday 3 December 2014