I'm writing this because a spent a good 8 hours trying to get my phone to where it is. This was definately more complicated than htc or the many Galaxys ive used. went back and forth downgrading and bricking and edl and etc
Started: 7.0 B15 ( used off of amazon sale)
after many different methods, this is what worked. I wont share links, you can search and fin them
1- Down Grade to 6.x on B29
3- download AXON7-A2017U-BL-UNLOCK-KIT
4- copy extracted files to SD
5- Downgrade to B29 on B20
8- B20 unlock
you now have unlocked bootloader.
Flash TWRP
Flash SU
Flash xposed.
This worked for me
Started: 7.0 B15 ( used off of amazon sale)
after many different methods, this is what worked. I wont share links, you can search and fin them
1- Down Grade to 6.x on B29
get in to recovery mode and flash from SD "America A2017U SD card software package(323140B2979A2017UV1.0.0B29)SD NEW"
2- boot the phone and log in , etc.. turn on usb debugging and oem unlocking3- download AXON7-A2017U-BL-UNLOCK-KIT
4- copy extracted files to SD
5- Downgrade to B29 on B20
get in to recovery mode and flash from SD "STEP_1_3-B20_FULL_OTA.zip"
6- B20 installreboot into boot loader , get in to recovery mode , and flash from SD "STEP_2-B20_UNLOCKABLE_BL.zip"
7- boot the phone and log in , etc.. turn on usb debugging and oem unlocking8- B20 unlock
reboot into boot loader. On your computer use command prompt and type "fastboot devices" . If you see your device than proceed to "fastboot oem unlock". Choose unlock on the phone ( void warrenty)
9- Upgrade from B20 to B29, by flashing from SD update.zip from "America A2017U SD card software package(323140B2979A2017UV1.0.0B29)SD NEW"you now have unlocked bootloader.
Flash TWRP
Flash SU
Flash xposed.
This worked for me