[P8lite Q&A, Help & Troubleshooting] amageek:
yes it is possbile... but a long way..

Things you need:

Root

Unlocked bootloader

TWRP recovery

Stock Recovery

First thing first, unlock your bootloader (see chapter 2 of this MEGA thread). Then you need TWRP recovery. Download this : (it contains root file and twrp).

TWRP and ROOT

Now, tap your build number 7-10 times, this will get you Developers Option on Settings. Go to Developers Option and enable it, also you must enable "Enable USB Debugging.. then connect it to your computer. Now extract the downloaded folder, you'll see a folder named data. go inside that and hold Shift and Right Click and Click on Open Commands Windows Here.. run following commands inside quotations:

"adb devices" -> lists your device, if it doesn't then you have some problems while enabling USB debugging... do it again..

"adb reboot bootloader" -> it will reboot the device to white screen with android logo and it must display "Unlocked" on green colours. if it doesn't, it means you havent unlocked your bootloader and you must not proceed any further..

"fastboot flash recovery recovery.img" -> doing this will flash TWRP recovery

"fastboot reboot"->reboots the device..

For rooting, copy 1.zip and 2.zip to your phone/sd card. Then you must go to recovery mode. Connect your mobile to computer via USB cable, and open commands window on data folder (same as you did for TWRP).

"adb reboot recovery" -> will go to TWRP recovery. Click on Install and select 1.zip first to flash... after flashing it will reboot your device. Open the SuperSu app once and close and uninstall it. Go to recovery mode again and then flash 2.zip.. it will reboot again.. now, download Es File explorer or other root browsers. go to /data/app and cut eu.chainfire.supersu and paste it in /system/app with the following permissions rwx r-x r-x and reboot. Congrats, you are rooted now.. Off to next steps.

Now, as you're rooted. Download this file ... After downloading this file you need to copy and paste to this path: /dev/block/platform/hi_mci.0/by-name (for this, you need to be rooted).. It will change your region from c185 to c432.. Restart and you must have c432.

Now, unroot your device and flash stock recovery(for the time being). It is necessary to have stock recovery and be unrooted while upgrading android.

Upgrading process

Download this http://huaweidevices.ru/huaweiservic...urope_Dual.rar B132 version, there must be 2 folders "dload"(it should contain UPDATE.APP with file size approx. 1.3 GB) and "custom" (custom folder must also have UPDATE.APP file inside it, but very small in size) , copy the dload folder to internal memory of your phone (the folder must have updata.app inside it) and do local update... after that copy the custom folder to your device and rename it to dload and do local update again.

Note: it is necessary to flash larger UPDATE file and then smaller UPDATE file to remove Balong issues.

Then download this: http://huaweidevices.ru/huaweiservic...170_Europe.zip B170 version and repeat the above process of upgrading.

after this you should be able to see OTA update of B550/B560 marshmallow update... if it doesn't show yet, then download it from here: http://download-c.huawei.com/downloa...20&siteCode=es B550 version.