Today, I just acidentally upgraded my phone successful. It is perfect now.
My model is Huawei P9 EVA-AL10.
Before, it was running on EVA-AL10C00B198 rooted, bootloader unlocked, recovery twrp-3.0.2.rc3.modaco. I do not want chinese and i removed all bloatwave included magazine unlock, lunar etc....
I felt tired of upgrading process because i am using this phone for my own business. it take time to restore as my will.
I tried this fRomFuture and NewWorld v6.6 but location with network did not works on both roms. sad, i spent many times for upgrading, flash, back to stock etc. They are not perfect.
I am using Huawei X1, Huawei X2, both of them are running kangvip roms. They are working perfectly. Those roms have many features i need. That is the reason i was tried many rom.
My luck has come since i saw the new kangvip b377. I decided to upgrade to Android 7 with HiCare app. Omg, it upgraded sucessfully and i did not lose any app (with TWRP?). after that bootloader was unlocked (great)
I rooted my phone with old TWRP but it did not work, i had to flash new TWRP-3.0.2.0-n and it could flash supersu v2.79 but when I booted to system, supersu did not work.
I rebooted to recovery and flashedkangvip b377, the twrp said many errors BUT when it rebooted, it worked perfectly and rooted. WEIRD. I did not understand why.
Now my phone have many features, rooted, location service with network works, no bug, get rid of chinese stuffs, dual sims work.
Perfect