[ZTE Axon 7 Guides, News, & Discussion] mischa_martin:
First of all,

all this was performed on a bootloader locked unbranded A2017G shipped with B05 bought some days ago in the german electronic market Saturn.

I can't guarantee that your device will react the same way to A2017U firmware as mine did.

So all actions you perform on your device happen under your responsibility

​

In the following I collected some information on how to flash A2017U's firmware on A2017G.

Requirements:

- Working adb environment

- A2017G

- Computer

- At least 4gb sdcard

- USB-C Cable

Guide

BACKUP YOUR DEVICE BEFORE CONTINUING (/data will be wiped!)

1. Download needed files.

2. Put ZTE_A2017U.B29_StockSystem_by_DrakenFX.zip on an external sdcard

3. Install Qualcomm drivers with WWAN option

4. Make sure everything is backed up and power off your device

5. Press volume down and power key to boot your phone to FTM Mode

6. Connect it to your computer and reboot it to edl using

adb reboot edl

7. Determine port number from device manager

9. Extract TWRP recovery.img next to axon7backup.exe

10. Flash TWRP using cmd and axon7backup.exe

axon7backup.exe -p *your port* -r

11 Unplug your device and hold power and volume up

12. In TWRP wipe data and cache

13. Flash ZTE_A2017U.B29_StockSystem_by_DrakenFX.zip from your external sdcard

14. Reboot and enjoy :)

More info on points 3 to 8

Downloads

EDL Drivers from [MENTION=540283]tenfar[/MENTION]

http://d-h.st/35tx

TWRP from [MENTION=540283]tenfar[/MENTION]:

http://d-h.st/dgWW

axon7backup.exe from [MENTION=540283]tenfar[/MENTION]

http://d-h.st/Ienb

ZTE_A2017U.B29_StockSystem_by_DrakenFX.zip from [MENTION=3044858]DrakenFX[/MENTION]

http://xdaforums.com/showpost.php?p=68873482&postcount=2

Bugs

- Dual-SIM settings crashing (Dual-SIM functionality is said to be working)

11-06 18:21:07.745 2334 2334 E guojingdong: case=4Preference mIsIndicator=true
11-06 18:21:07.745 2334 2334 E guojingdong: Preference attr=3 a.getIndexCount()=511-06 18:21:07.935 914 982 E ModemAPI: qmi_vs_client_send_msg_sync returned error -45
11-06 18:21:07.935 914 982 E ModemAPI: modem_read_efs, exit result 0
11-06 18:21:07.935 914 982 E ModemService_D: modem_service_response_send_succeed_response error : out of max data size

- Missing locales (workaround it by changing your locale with this app https://play.google.com/store/apps/details?id=sightidea.com.setlocale)

- You tell me

Differences between A2017U and A2017G firmware

- US Version has optional notification bell

- US Version has fixed 1440p playback

- EU Version has the option to start apps at specified fingerprints

- EU Version has interchangable fonts

- EU Version has "Assertive display" (Maybe US Version has it too but there is no settings option to turn it on or off)

I will keep this updated as discussion in this thread goes on :)

Assorted, other information + Back to A2017G

About OTA:

You will probably recieve them as your device seems no different to ZTE servers than a legitimate A2017U

But I really wouldn't recommend applying these as they sometimes bundle bootloader files with them and we don't know if these will work on A2017G.

Just wait for [MENTION=3044858]DrakenFX[/MENTION] or someone else to create a flashable zip with boot and system only :)

Back to A2017G:

Just wipe data/cache and flash the flashable zip for B03 from [MENTION=3044858]DrakenFX[/MENTION] in TWRP

http://xdaforums.com/showpost.php?p=68873485&postcount=3

Then apply B05 by OTA or downloaded update.zip on external sdcard.

Sources/Thanks

Thanks to [MENTION=540283]tenfar[/MENTION] for TWRP and the tool to flash it

http://xdaforums.com/axon-7/development/wip-axon-7-root-bootloader-unlokced-t3441204

Thanks to [MENTION=3044858]DrakenFX[/MENTION] for the A2017U stock images

http://xdaforums.com/showpost.php?p=68873482