[GUIDE][DISCUSSION] A2017U Firmware on A2017G - ZTE Axon 7 Guides, News, & Discussion

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
Code:
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
Code:
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 @tenfar
http://d-h.st/35tx
TWRP from @tenfar:
http://d-h.st/dgWW
axon7backup.exe from @tenfar
http://d-h.st/Ienb
ZTE_A2017U.B29_StockSystem_by_DrakenFX.zip from @DrakenFX
http://forum.xda-developers.com/showpost.php?p=68873482&postcount=2
Bugs
- Dual-SIM settings crashing (Dual-SIM functionality is said to be working)
Code:
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 @DrakenFX 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 @DrakenFX in TWRP
http://forum.xda-developers.com/showpost.php?p=68873485&postcount=3
Then apply B05 by OTA or downloaded update.zip on external sdcard.
Sources/Thanks
Thanks to @tenfar for TWRP and the tool to flash it
http://forum.xda-developers.com/axon-7/development/wip-axon-7-root-bootloader-unlokced-t3441204
Thanks to @DrakenFX for the A2017U stock images
http://forum.xda-developers.com/showpost.php?p=68873482

---

Can you please upload the file if we want to return back to stock B05.
It will be very helpful.
Even take some time to do that.(you can do in the next couple of days)
Thanks for the guide also.
Sent from my iPad using Tapatalk

---

paatha13 said:
Can you please upload the file if we want to return back to stock B05.
It will be very helpful.
Even take some time to do that.(you can do in the next couple of days)
Thanks for the guide also.
Sent from my iPad using Tapatalk
Click to expand...
Click to collapse
Updated OP with according information
Regards,
mischa_martin

---

Well done! this will probably help a lot of the people who complain about the european ZTE support!
I will personally wait for one more update and if I don't like it I will probably switch to the US software too!
One question: Does this include the better audio performance (louder sounds etc.) like some US users reported?
Cheers

---

Thank you so much!

---

How exactly go into adb environments?
What step do we need to do within windows?
Sent from my iPad using Tapatalk

---

paatha13 said:
How exactly go into adb environments?
What step do we need to do within windows?
Sent from my iPad using Tapatalk
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=2317790

---

Well I'm having trouble with Qualcomm drivers.
Not recognize by windows.
I try it second time after uninstalling it but again nothing.
{
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Sent from my iPad using Tapatalk

---

paatha13 said:
Well I'm having trouble with Qualcomm drivers.
Not recognize by windows.
I try it second time after uninstalling it but again nothing.
Sent from my iPad using Tapatalk
Click to expand...
Click to collapse
Did you put your phone into FTM mode?
EDIT:
No, you have to install adb drivers too

---

Hmmm, would like to switch to the US firmware too but what's with the Dual-SIM not working?...

---

Abiram26 said:
Hmmm, would like to switch to the US firmware too but what's with the Dual-SIM not working?...
Click to expand...
Click to collapse
Code:
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
Do you understand what is going on here?
No?
Me neither

---

mischa_martin said:
Did you put your phone into FTM mode?
EDIT:
No, you have to install adb drivers too
Click to expand...
Click to collapse
Ok drivers installed successfully both Qualcomm and adb.
Now I'm in cmd.
This is my port.
And now I'm here.
What exactly do I write?
Sent from my iPad using Tapatalk

---

Does it work with A2017?

---

paatha13 said:
Ok drivers installed successfully both Qualcomm and adb.
Now I'm in cmd.
This is my port.
Sent from my iPad using Tapatalk
Click to expand...
Click to collapse
Just read @tenfar 's thread or my instructions.
Extract the TWRP recovery.img next to the axon7backup.exe and open an cmd window in which you execute the given command.

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mischa_martin said:
Just read @tenfar 's thread or my instructions.
Extract the TWRP recovery.img next to the axon7backup.exe and open an cmd window in which you execute the given command.
Click to expand...
Click to collapse
TWRP is ISO file when extracting it.
Sent from my iPad using Tapatalk

---

paatha13 said:
TWRP is ISO file when extracting it.
Sent from my iPad using Tapatalk
Click to expand...
Click to collapse
Nooo put that recovery.img file next to the exe and execute the command

---

paatha13 said:
TWRP is ISO file when extracting it.
Sent from my iPad using Tapatalk
Click to expand...
Click to collapse
axon7root-a2017g-b03.zip
In this file, there is the proper recovery.img next to boot.img and axon7root app itself.
Abiram26 said:
Hmmm, would like to switch to the US firmware too but what's with the Dual-SIM not working?...
Click to expand...
Click to collapse
Dual SIM is working but the settings. :cyclops: I have my main SIM in tray 1 using for calls+data+messaging and my SIM2 is in the 2nd slot, I'm just answering calls from work. If you need any special setup, you'll be in trouble.

---

thefiqs said:
axon7root-a2017g-b03.zip
In this file, there is the proper recovery.img next to boot.img and axon7root app itself.
Dual SIM is working but the settings. :cyclops: I have my main SIM in tray 1 using for calls+data+messaging and my SIM2 is in the 2nd slot, I'm just answering calls from work. If you need any special setup, you'll be in trouble.
Click to expand...
Click to collapse
But I'm on B05.
Does it matter if I use B03 recovery img
I'm giving up.
Thanks for he help but just don't understand how will do the all process.
I've never done this kind in the past and don't know what exactly to do.
If there's a video instructions on YouTube would be more helpful to me.
The all problem begins from step 7-9.
Sent from my iPad using Tapatalk

---

mischa_martin said:
Code:
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
Do you understand what is going on here?
No?
Me neither
Click to expand...
Click to collapse
I would try to replace/copy the firmware files from B05 to the B29 Rom. Just copy the files from the attachment into the folder etc/firmware in your system partition. I'm quite sure the modem files are not the right one for th A2017G. But I can't tell you which from them are modem related.

---

paatha13 said:
But I'm on B05.
Does it matter if I use B03 recovery img
I'm giving up.
Thanks for he help but just don't understand how will do the all process.
I've never done this kind in the past and don't know what exactly to do.
If there's a video instructions on YouTube would be more helpful to me.
The all problem begins from step 7-9.
Sent from my iPad using Tapatalk
Click to expand...
Click to collapse
Because I didn't take the risk and downgraded from B05 to B03 before the whole process, I honestly don't know. And just recommend the same to you. If you don't know how to downgrade:
Download the B03 from the link below. Extract it and copy the update.zip to the root folder of your internal SD. Open Settings and go to Updates. Hit Install.
https://mega.nz/#F!kYtRAJjJ!5tD1zPpo0nw2tJwhANA9pQ!tNsQhD5Y
I have my much more detailed guide almost ready. But I need to go work, so won't start to explain it.
---------- Post added at 08:44 PM ---------- Previous post was at 08:43 PM ----------
tron1 said:
I would try to replace/copy the firmware files from B05 to the B29 Rom. Just copy the files from the attachment into the folder etc/firmware in your system partition. I'm quite sure the modem files are not the right one for th A2017G. But I can't tell you which from them are modem related.
Click to expand...
Click to collapse
Please let us know your experiences.