[Huawei P9 Lite Guides, News, & Discussion] SALVO9:
Hi, everyone.

I did this to my device and succeeded, so I thought I'd share the procedure with you, if you want to do so, too.

IMPORTANT: I am NOT responsible if you damage your device by following this guide; I am an XDA member like you and I am just sharing a guide that worked for me.

I am assuming you have all the Huawei and ADB drivers installed on your computer and know some basics on how to do these things; if you have no clue where to start, don't risk.

First of all, you need to be in C432B161.

You need to download:

1. This toolkit https://xdaforums.com/huawei-p9lite/development/europe-vns-l31-toolkit-bootloader-t3432873 and relative package for C432;

2. OEMinfo for C636 you can attached to this post (thank you to the creator);

3. B170 update.app from C636 you can find in this package (1) http://update.hicloud.com:8180/TDS/data/files/p3/s15/G1164/g104/v66846/f1/full/update.zip

4. the firmware package and data files (B361) you can find here

(1) http://update.hicloud.com:8180/TDS/data/files/p3/s15/G1258/g104/v77171/f1/full/update.zip (2)http://update.hicloud.com:8180/TDS/...cseas/update_data_full_VNS-L31_hw_spcseas.zip

Procedure

1. Back up all your data because this is going to erase everything from your phone;

2. Open the toolkit, and after installing the package for your device, unlock your bootloader, install TWRP and root your device which you can also do directly from the recovery (the tool is very easy to use and I am not going to be extremely detailed on this one);

3. In the toolkit, change the OEMinfo of your device by selecting the custom.bin and OEMinfo you find in the package attached to this post;

4. Reboot your device by entering the Huawei recovery and do a hard reset/cache clean from there;

5. Insert the update.app file you find in the C636 update package (which is B170) in a folder on your SD you rename "dload" (obviously without the brackets);

6. SD in your device, press the volume keys and power button to upgrade your phone to C636B170... I got an error during this process, but the phone booted and I proceeded regardless;

7. Do the same procedure as before: this time only unlock bootloader and install TWRP recovery by using the toolkit, and in the meantime put the two files to upgrade to B361 in your SD and put it back in the device;

8. Enter TWRP by pressing volume up + power button, install the update package first and then the data files;

9. Do a hard reset from the Huawei recovery you now have, and clean the cache. Reboot;

You are now in C636B360, the Nougat update I find the most stable.

If you want to get rid of the initial booting warning, you can relock your bootloader by doing so:

1. Connect your device to you PC, and from the ADB drivers folder on your hard disk, you open a CMD command (right click on your mouse while holding Shift, then "open command in here" or something similar)

2. Switch off your device, then connect it to USB and immediately switch it on while holding volume down button;

3. In the CMD window, type "fastboot devices" and then Enter to make sure your PC detects the phone;

4. Type oem relock + your bootloader code;

5. The phone will ask you if you want to relock the bootloader;

Done!