I have a problem that i've been fixing for 3 months. I assked assistance on facebook in official fb group m6 development. Nothing helped.
The problem:
I can't make call in europe, my broadband is undefined, both imei are null.
During my trail and error i even hard bricked the device, tried to flash modem partition ended flashing the wrong partition.
Fixed it and now imei is still null, broadband undefined afer flashing Meizu_M6_Note_M1721_30082017_QFIL.zip from android brick.
My device model on the back is M721Q, when it came from the seller it wrote M721H in About section in Settings.
Note here initial IMEI corrruption wasn't from flashing using QFIL it was after a phone call ! A basic function of a phone.

Things I've tryed:
- Official recovery mode wipe data - recover succesfull twice, third time nothing! the same problem occurred
- WriteDualIMEI-W-G-eMMC tool for snapdragoon devices
- Flash from edl moode using qfil
- updating to chineese rom from my current global rom
- updating and trying all global roms

Please help! Can't use phone in this condition for its basic function.