When using a Huawei phone, you have upgraded to a higher version of Rom, but, the problem generates errors that you can not handle, or you may prefer the older Rom.
Huawei will help you solve this problem, they have released some rollbacks, this is the solution to help you return to the Rom you like.
HUAWEI Rollback Package (ALE-L21, C636B522)
HUAWEI Mate8 Rollback Package (NXT-L29, from EMUI5.0+Android7.0 rollback to EMUI4.0+Android 6.0, C900B500)
HUAWEI P8 Lite Rollback Package (ALE-L21, C900B500, Android 6.0 to Android 5.0)
HUAWEI P9 Rollback Package (EVA-L19, from EMUI5.0+Android7.0 rollback to EMUI4.1+Android 6.0, C900B300)
HUAWEI P9 Lite Rollback Package (VNS-L31, from Android7.0+EMUI5.0 rollback to Android6.0+EMUI4.1, C900B300)
HUAWEI GR5 Mini Rollback Package (NMO-L31, from EMUI5.0+Android7.0 rollback to EMUI4.1+Android 6.0, C636B300)
HUAWEI GR5 2017 Rollback Package (BLL-L22, from EMUI5.0+Android7.0 rollback to EMUI4.1+Android 6.0, C900B300)
HUAWEI G Play Mini Rollback Package (CHC-U01, C900B500a, Android 6.0, EMUI4.0 to Android 5.1, EMUI3.1 Transfer Version)
Option 1: Insert the memory card into the phone, turn off the power and hold down the power key combination + 2 keys increase and decrease the volume at the same time. Update itself
Option 2: Insert the memory card into the phone, enter the keypad (Dialer), enter * # * # 2846579 # * # *, then select SoftwareUpgrade> SD card upgrade> ok.
Done, thanks visit.
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