Are you one of the people who, when updating to Android Nougat (B370 onwards) on the Huawei P9 Lite, build number left in test-keys when in fact it is how it would be to the beta testers of Huawei? Many times, when installing software that has not yet been confirmed and later signed this usually happens, but there is no need to worry, it has a solution.
Therefore, in this article I come to teach you how to get back from Android Nougat with test-keys to Android Marshmallow so that you can try again to install Android Nougat correctly since the trigger for this error is to install the wrong firmware.
Previous steps before starting
- Have the phone charged at least up to 60%
- As I already explained in previous articles, the first of all would be make a backup from our files as the following method factory restores the entire phone.
Install the middle package
This file we will use it as a bridge to be able to install Marshmallow again. Remember that the Build number of this update is C900B300.
Being in Nougat, we create a folder in the SD called dload, we unzip the file and put it in the folder we have created. Subsequently, we turn off the phone and press Volume-, Volume + and Power y the phone will start the installation automatically.
Once the terminal starts, check that the build number is C900B300 In order to follow the procedure, do not be alarmed as it is normal.
Marshmallow Installation (C432)
We download this Marshmallow firmware, I in my opinion I would install the C432B160 since it does not give problems of any kind, others give problems with Google services and leave the mobile inaccessible forcing the user to install another Firmware that does not have that problem.
We create a folder in the SD called dload, we unzip the file until it is named UPDATE.APP and we save it in the folder we have created. Then, we turn off our phone and start the restoration with the same combination of buttons that we used previously Volume-, Volume + and Power. The restoration will automatically begin and we will have Android Marshmallow to later install Android Nougat if you wish.