Una explicación de ChinHOn (creador de twrp para nuestro terminal ) en xda sobre la forma de hacer un backup completo de nuestra rom. Pego el enlace y la explicación en inglés. Parece que necesitamos instalar el erecovery y twrp a la vez.
https://forum.xda-developers.com/p8l...3582179/page45
I have some time right now. And now write a detailed guide on how to secure your firmware.
Only the stock rom. Your apps with settings will be lost. In case of emergency please have the huawei bootloader code ready.
1. Activate the oem unlocking in the device settings.
2. Activate the usb-debug mode there. You have to repeat two or three times because it will reset itself several times.
3. Switch off the unit.
4. Connect to the pc.
5. Start the bootloader with power and vol.-
6. Flash the recovery with adb:
fastboot flash recovery recovery.img.
7. Flash with adb the TWRP:
fastboot flash recovery2 prague311.img.
7.1 In the future you will start with vol.+ and power and usb connection to TWRP and with vol.+ and power without usb connection to the stock recovery.
8. Start now the device directly by key combi into the stock recovery and make a factoryreset.
9. Start now by key combi and usb to TWRP and make a factoryreset again. No reboot durig this two steps.
10. Now you can create a complete backup. Make sure you choose the extSd for this.
11. Reboot now and see if everything's okay.
12. Delete all old TWRP backups except the one you just created. You can now make correct backups and restorings.
13. Don't do factoryreset in the future. That's forbidden from now on. If it gets stuck, restore the 1st backup (that from before). It puts everything back on stock.
14. If you do an ota update at some point, TWRP will be overwritten automatically. Then flash TWRP to recovery2 again and repeat the whole procedure.
I wish you every success in this action.
Just take it easy, and follow the instructions carefully