[Mate 8 Android Development] jbmc83:
hey guys, just wanted to give a report on my experience with the kangvip B577. just a heads up: its not worth the trouble! :)

so heres how i installed it: (Im on a AL10 64/4 GB btw)

0. started off with kangvip slim B357. made backups via twrp and titanium backup and transferred my data onto my laptop (dont have an external SD)

1. installed stock recovery for EMUI 4.1 via SRKTool (very handy tool i must say, much appreciation to [MENTION=4008653]somboons[/MENTION] !)

2. Installed Stock B386 via dload method and did a wipe / factory reset

3. booted into B386, enabled USB debugging

4. Used SRKTool to install TWRP for EMUI 4.1, wiped the data partition to get rid of encryption

5. since data partition has to be wiped and a reboot would encrypt it again, i uploaded B552 and its data.zip via ADB while i was still in TWRP

6. Flashed B552 plus its data package via TWRP, followed by factory reset

7. boot into B552, enable usb debugging, update via system update to stock B575

8. Boot into B575, enable USB debugging (btw, this step is always important so that you can use fastboot/adb/SRKTool in case something goes wrong, so ALWAYS do that first!)

9. replace TWRP for EMUI 4.1 in SRKTool folder with Chinese TWRP for Nougat, flash it via SRKTool

10. Boot into TWRP, switch from chinese to English, wipe data partition to get rid of encryption

11. Upload KangVIP B577 and patched Boot.zip for B575 via ADB while still in TWRP

12. Flash KangVIP B577 and patched Boot.zip in one go, followed by factory reset and wipe cache/Dalvik/ART

13. Installation done

However, no matter what i tried, i couldnt get Google Play Store to work! I tried Google Installer Apk v2 for chinese phones, tried installing Framework Services, Play Store Services, Play Store, etc. manually, tried all kinds of different versions (including all that have been mentioned in this thread to get Play Store to work on KangVIP B577), but no dice in the end! Also, root access is weird, it takes forever for SuperSU to realize that there is an app trying to get root access. So i had to wait like 10-15 minutes for the notification bubble to show up for Busybox on rails and Titanium Backup before I could grant them Root...

So what i did was go back to Stock B575. For that, its sufficient to use erecovery, it will automatically download and install B575 Stock :)

After that:

1. Use SRKTool to flash TWRP for Nougat

2. Wipe Data partition in TWRP to get rid of encryption

3. Upload patched boot.zip via ADB, flash in TWRP

4. Enjoy

Surprisingly, Google Services came preinstalled in stock B575, so i just needed to install Play Store via HiApp and then Google Apps that i need. Restoring Backup from Titanium went smoothly for user apps. System Apps, however, had to be manually installed, but then I could restore their data and settings from the Backup, so that saved me a lot of trouble :)

Concerning Root, that was pretty straight forward: Flash the latest stable SuperSU 2.79 through TWRP and thats it :)

Now lets see how the battery life stacks up... on KangVIP B357 I had between 9 and 11 hours SOT, so thats the benchmark to reach or beat :)

TL;DR: My personal recommendation is to stick with B575 Stock, KangVIP B577 is just too much hassle, both for Root access and Google Services functionality. B575 Stock, however, works flawlessly, only thing to determine now is battery life :)

Cheers!