Database Info

How to get DUAL SIM SELECTION 3/4G working on 702L after flashing 703 ROMs

UPDATE (on 28 Nov 2015)
====================
Updated thread by "ajsmsg78" on B110 ROM from 703L that can be flashed onto your 702L model plus the benefit of Dual SIM selection preserved, rooted with superSu, Google Play and Contacts sync included. Please go to:
http://forum.xda-developers.com/mediapad-x2/development/rom-stock-b106-gapps-t3230585
UPDATE (on 22 Nov 2015)
====================
Thanks to "ajsmsg78" for detailed explanation and posting flashable ROMs to achieve this for 702L owners like me. Please go to:
http://forum.xda-developers.com/mediapad-x2/development/mod-sim-card-switching-fix-t3254534
INITIAL POST
==========
Firstly please follow the guide on how to flash 703L ROMs onto your 702L here:
http://forum.xda-developers.com/mediapad-x2/general/how-to-flash-rom-x2-gem-703l-gem-702l-t3228915
After flashing your "About Device" will show mostly wrong info but the next step below will rectify it.
After rebooting and ensuring the 703L ROM is running fine on your 702L, go into BOOTLOADER mode and do:
"fastboot flash cust CUST.img" ---- the "CUST.img is extracted from your stock B003 (702L) UPDATE.APP ROM file.
For example I flashed stock B106 onto my 702L and then rooted it and installed Kang_5.1.1_twrp as well so that I can make backup of my phone whenever I flash anything new. The "About Device" will show that it's a B106 but the Android version will show 4.3 and EMUI 2.0 etc mostly wrong info. Also the Dual SIM selection of 3/4G will not be working anymore.
After I flashed the CUST.img from the stock B003, not only the "About Device" show the right info indicating Android 5.1.1 and EMUI 3.1 (the build info will show B003 but it's ok) now I got back my Dual SIM selection of 3/4G !!!
Credit to
1) "ajsmsg78" post #114 on the below thread:
http://forum.xda-developers.com/med...lash-rom-x2-gem-703l-gem-702l-t3228915/page12
and
2) "Mirikiri25" post #118 on the same thread above
Due to both of their advice, I tried it on my 702L and it worked so I'm just summarizing my sharing as a result of both their advice and contribution ! THANKS !

After flashing B106 stock ROM on my 702L

After flashing CUST.img from the B003 Stock 702L ROM. Now showing correct info except the BUILD

Dual SIM selection for 3/4G working !!!

Good news. I Upload b003-cust.img from 702L's rom to mediafire.
Download at : http://www.mediafire.com/download/mq...c69rz/CUST.img

kpcheang2 said:
Firstly please follow the guide on how to flash 703L ROMs onto your 702L here:
http://forum.xda-developers.com/mediapad-x2/general/how-to-flash-rom-x2-gem-703l-gem-702l-t3228915
After flashing your "About Device" will show mostly wrong info but the next step below will rectify it.
After rebooting and ensuring the 703L ROM is running fine on your 702L, go into BOOTLOADER mode and do:
"fastboot flash cust CUST.img" ---- the "CUST.img is extracted from your stock B003 (702L) UPDATE.APP ROM file.
For example I flashed stock B106 onto my 702L and then rooted it and installed Kang_5.1.1_twrp as well so that I can make backup of my phone whenever I flash anything new. The "About Device" will show that it's a B106 but the Android version will show 4.3 and EMUI 2.0 etc mostly wrong info. Also the Dual SIM selection of 3/4G will not be working anymore.
After I flashed the CUST.img from the stock B003, not only the "About Device" show the right info indicating Android 5.1.1 and EMUI 3.1 (the build info will show B003 but it's ok) now I got back my Dual SIM selection of 3/4G !!!
Credit to
1) "ajsmsg78" post #114 on the below thread:
http://forum.xda-developers.com/med...lash-rom-x2-gem-703l-gem-702l-t3228915/page12
and
2) "Mirikiri25" post #118 on the same thread above
Due to both of their advice, I tried it on my 702L and it worked so I'm just summarizing my sharing as a result of both their advice and contribution ! THANKS !
Click to expand...
Click to collapse
Great post. So you flashed the cust from your stock 702L ROM and everything is working. Any time you flash a new ROM that also flashes a new cust folder just fastboot flash your original cust folder and that should fix it I'm assuming.

ajsmsg78 said:
Great post. So you flashed the cust from your stock 702L ROM and everything is working. Any time you flash a new ROM that also flashes a new cust folder just fastboot flash your original cust folder and that should fix it I'm assuming.
Click to expand...
Click to collapse
Very likely this is the case - will try with B109 or B110 next time. Will observe my B106 for a week but so far working fine !

kpcheang2 said:
Very likely this is the case - will try with B109 or B110 next time. Will observe my B106 for a week but so far working fine !
Click to expand...
Click to collapse
https://docviewer.yandex.com/?url=ya-disk-public%3A%2F%2FvI5Y3Obeku4qzIrtHfPviJPL3yhTpSABBi9V4fM0UpU%3D%3A%2FRom%2FOriginal%2FGEM-702L%20V100R001C209B003CUSTC999D001_Client%20Software_countryValue_operatorValue_Android%205.0_EMUI%203.0.5_05013ANX.zip&name=GEM-702L%20V100R001C209B003CUSTC999D001_Client%20Software_countryValue_operatorValue_Android%205.0_EMUI%203.0.5_05013ANX.zip&c=5650fa6c57a8
Is that the latest Stock ROM for the 702L? EDIT: Nevermind, I answered my own question.

ajsmsg78 said:
https://docviewer.yandex.com/?url=ya-disk-public%3A%2F%2FvI5Y3Obeku4qzIrtHfPviJPL3yhTpSABBi9V4fM0UpU%3D%3A%2FRom%2FOriginal%2FGEM-702L%20V100R001C209B003CUSTC999D001_Client%20Software_countryValue_operatorValue_Android%205.0_EMUI%203.0.5_05013ANX.zip&name=GEM-702L%20V100R001C209B003CUSTC999D001_Client%20Software_countryValue_operatorValue_Android%205.0_EMUI%203.0.5_05013ANX.zip&c=5650fa6c57a8
Is that the latest Stock ROM for the 702L? EDIT: Nevermind, I answered my own question.
Click to expand...
Click to collapse
Yup there is only this one the B003.

kpcheang2 said:
Yup there is only this one the B003.
Click to expand...
Click to collapse
I sent you a PM with a ROM i created for the 702L. Can you test it for me? Thanks.

ajsmsg78 said:
I sent you a PM with a ROM i created for the 702L. Can you test it for me? Thanks.
Click to expand...
Click to collapse
Ok saw it......will try tonight once I reach home (it's day right now my time zone)

I wanted to give this a try too but somehow I can't flash the CUST.img file ("cannot load CUST.img"). Would you mind sharing just the CUST.img file you used?
*Finally got it to flash. Stupid user error..
Thanks a lot for sharing the information, I can finally get dual SIM selection + carrier aggregation back!!!
**After some further testing, it seems the notification problem with the 702L is back. I.e. notifications aren't sent to android wear devices. (This bug was fixed in the later updates for the 703L hence why I decided to flash to 703L ROM in the first place)

btuser001 said:
I wanted to give this a try too but somehow I can't flash the CUST.img file ("cannot load CUST.img"). Would you mind sharing just the CUST.img file you used?
*Finally got it to flash. Stupid user error..
Thanks a lot for sharing the information, I can finally get dual SIM selection + carrier aggregation back!!!
**After some further testing, it seems the notification problem with the 702L is back. I.e. notifications aren't sent to android wear devices. (This bug was fixed in the later updates for the 703L hence why I decided to flash to 703L ROM in the first place)
Click to expand...
Click to collapse
I've no issue with notifications working with my Huawei Watch from my 702L ?
I used to have notification dropping issues B003 stock Android 5.0.5 but ever since I flashed 703 stock B106 which is Android 5.1.1 I never had the problem anymore.
Even after the Dual SIM selection now working the notifications working great on either my Sony SmartBand SWR30 as well as the Android Wear Huawei Watch.

I'll give it another go, factory reset the watch this time and uninstall / reinstall android wear
Btw, is multi-window working for you?

I Upload b003-cust.img from 702L's rom to mediafire.
Download at : http://www.mediafire.com/download/mqh33o36uzc69rz/CUST.img
---------- Post added at 08:57 AM ---------- Previous post was at 08:50 AM ----------
btuser001 said:
I wanted to give this a try too but somehow I can't flash the CUST.img file ("cannot load CUST.img"). Would you mind sharing just the CUST.img file you used?
*Finally got it to flash. Stupid user error..
Thanks a lot for sharing the information, I can finally get dual SIM selection + carrier aggregation back!!!
**After some further testing, it seems the notification problem with the 702L is back. I.e. notifications aren't sent to android wear devices. (This bug was fixed in the later updates for the 703L hence why I decided to flash to 703L ROM in the first place)
Click to expand...
Click to collapse
I Upload b003-cust.img from 702L's rom to mediafire.
Download at : http://www.mediafire.com/download/mq...c69rz/CUST.img

eennap said:
I Upload b003-cust.img from 702L's rom to mediafire.
Download at : http://www.mediafire.com/download/mqh33o36uzc69rz/CUST.img
---------- Post added at 08:57 AM ---------- Previous post was at 08:50 AM ----------
I Upload b003-cust.img from 702L's rom to mediafire.
Download at : http://www.mediafire.com/download/mq...c69rz/CUST.img
Click to expand...
Click to collapse
Thanks. I created a flashable zip to flash it. The thread and download link is here:
http://forum.xda-developers.com/mediapad-x2/development/mod-sim-card-switching-fix-t3254534

When I flash cust.img B003, File multiwindow_whitelist_apps.xml from /data/cust/xml/multiwindow_whitelist_apps.xml is missing.
I can't fix multiwindow for all app.
PS. All file in cust folder (data/cust)​ is missing. I copy cust folder from 109's rom then paste to. It's work but when restart, all file is missing again
Cust from 109's rom:http://www.mediafire.com/download/1mgbs2id2szo3m2/cust.zip
---------- Post added at 11:18 AM ---------- Previous post was at 11:06 AM ----------
btuser001 said:
I'll give it another go, factory reset the watch this time and uninstall / reinstall android wear
Btw, is multi-window working for you?
Click to expand...
Click to collapse
Multi-window for all app not work.

btuser001 said:
I'll give it another go, factory reset the watch this time and uninstall / reinstall android wear
Btw, is multi-window working for you?
Click to expand...
Click to collapse
Yes - my multi-window still working.

eennap said:
When I flash cust.img B003, File multiwindow_whitelist_apps.xml from /data/cust/xml/multiwindow_whitelist_apps.xml is missing.
I can't fix multiwindow for all app.
PS. All file in cust folder (data/cust)​ is missing. I copy cust folder from 109's rom then paste to. It's work but when restart, all file is missing again
Cust from 109's rom:http://www.mediafire.com/download/1mgbs2id2szo3m2/cust.zip
---------- Post added at 11:18 AM ---------- Previous post was at 11:06 AM ----------
Multi-window for all app not work.
Click to expand...
Click to collapse
After I flashed the CUST.img from 702L B003 / 703L B016 back and forth (I was testing) I suddenly lost the ability to use multi-window with my apps by changing the xml file. I discovered that the "cust" folder was corrupted (it became a file with no extension and flashing over it didn't get it back to normal). I finally deleted the "file" and created a "cust" folder myself and dropped the xml file in the newly created folder (/data/cust/xml/) and cleared cache + data from the HWdualwindowlauncher app and got multi-window working again.

btuser001 said:
After I flashed the CUST.img from 702L B003 / 703L B016 back and forth (I was testing) I suddenly lost the ability to use multi-window with my apps by changing the xml file. I discovered that the "cust" folder was corrupted (it became a file with no extension and flashing over it didn't get it back to normal). I finally deleted the "file" and created a "cust" folder myself and dropped the xml file in the newly created folder (/data/cust/xml/) and cleared cache + data from the HWdualwindowlauncher app and got multi-window working again.
Click to expand...
Click to collapse
If you restart device, Cust folder may be missing.

Problem of switching back to Gem-702l android6.0

Hi,
I really need some help. My phone is gem-702l model, on B112 stock rom of 703l.
Now that Huawei has released a stock Android 6.0 (B201) for gem-702l, I am thinking about switching back.
Here are the thing I did and problem that stopped me.
1. I updated to B209 following the instruction in XDA without any problem.
2. When successfully on B209, I downloaded my stock B201 rom in Huawei website and extracted the 5 required img files: recovery, system, boot, cust, userdata
3. I fastboot flash the 5 img files and reboot. So far so good. The About Pone is correct except internal storage volume.
4. I factory reset and format the internal SD. Now everything in About Phone is correct.
5, I put the dload of b201 in my MicroSD. Strangely there's no "update from SD Card" option, So I use the three key(power, vol+/-)to hard flash the whole dload directory. It failed.
THe problem is : it seems that I can only fastboot flash 5 img files of 702l, there's no way of doing the whole dload update.
Now my phone is not fully converted to Gem-702l. it's kind of half 703l and half 702l in android 6.0.
Is there anything I missed or anything I can do to make it fully converted to 702l?
Please help! thank you so much.

iamhcg said:
Hi,
I really need some help. My phone is gem-702l model, on B112 stock rom of 703l.
Now that Huawei has released a stock Android 6.0 (B201) for gem-702l, I am thinking about switching back.
Here are the thing I did and problem that stopped me.
1. I updated to B209 following the instruction in XDA without any problem.
2. When successfully on B209, I downloaded my stock B201 rom in Huawei website and extracted the 5 required img files: recovery, system, boot, cust, userdata
3. I fastboot flash the 5 img files and reboot. So far so good. The About Pone is correct except internal storage volume.
4. I factory reset and format the internal SD. Now everything in About Phone is correct.
5, I put the dload of b201 in my MicroSD. Strangely there's no "update from SD Card" option, So I use the three key(power, vol+/-)to hard flash the whole dload directory. It failed.
THe problem is : it seems that I can only fastboot flash 5 img files of 702l, there's no way of doing the whole dload update.
Now my phone is not fully converted to Gem-702l. it's kind of half 703l and half 702l in android 6.0.
Is there anything I missed or anything I can do to make it fully converted to 702l?
Please help! thank you so much.
Click to expand...
Click to collapse
First you need to go back to the last 703L 5.1 system (B112) then flash the universal cust mod, then try the dload to B201. You also may have to go back to the last 702L 5.0 rom before you try to update to B201 but i'm not totally sure.

ajsmsg78 said:
First you need to go back to the last 703L 5.1 system (B112) then flash the universal cust mod, then try the dload to B201. You also may have to go back to the last 702L 5.0 rom before you try to update to B201 but i'm not totally sure.
Click to expand...
Click to collapse
thanks.
I downgraded to B112 successfully and then tried the dload update. It didn't even go through the first 5 seconds and failed. I guess it's because my phone's on 703L cust so the 702l stock rom didn't apply to it.
As for downgrading to 5.0, there's still no way of doing that for 702l, so I am still stuck here.
******edited***
I just "fake flashed" back to5.0, which means fastboot flash the required img files, and tried to dload update to B201 of 702l.
It's still not working. Now I am at my wit's end.

iamhcg said:
thanks.
I downgraded to B112 successfully and then tried the dload update. It didn't even go through the first 5 seconds and failed. I guess it's because my phone's on 703L cust so the 702l stock rom didn't apply to it.
As for downgrading to 5.0, there's still no way of doing that for 702l, so I am still stuck here.
******edited***
I just "fake flashed" back to5.0, which means fastboot flash the required img files, and tried to dload update to B201 of 702l.
It's still not working. Now I am at my wit's end.
Click to expand...
Click to collapse
Flash the B112 universal cust in TWRP then fastboot flash back the stock recovery, then try the dload again. If that doesn't work, flash twrp, then the cust mod, then the stock recovery then so a factory reset from settings. If the reset completes successfully then flash twrp again then the cust mod then stock recovery then try the dload method again.

ajsmsg78 said:
Flash the B112 universal cust in TWRP then fastboot flash back the stock recovery, then try the dload again. If that doesn't work, flash twrp, then the cust mod, then the stock recovery then so a factory reset from settings. If the reset completes successfully then flash twrp again then the cust mod then stock recovery then try the dload method again.
Click to expand...
Click to collapse
That's exactly what I did. The dload just wouldn't go beyond 5 seconds.
The problem, I think, is that the universal cust marked the phone as 703l(that's the point of universal cust), but the stock rom B201 is for 702l. Therefore, the first 5 seconds of dloading when it verified the model, the stock rom and the model just didn't match. So the dload failed.
There's no flashable cust for 702l to make the phone match the requirement of stock B201 rom. I think this might be where the problem is.

The cust mod includes the cust from the 701L and 702L as well so it should work as long as you go back to B112. What is the reason you want to go back to the 702L firmware?

ajsmsg78 said:
The cust mod includes the cust from the 701L and 702L as well so it should work as long as you go back to B112. What is the reason you want to go back to the 702L firmware?
Click to expand...
Click to collapse
There are certain functions that only exist in my region, such as the nationwide SMS warning regarding natural disasters. It's a system that being developing in my country. All phone brands will integrate the thing in their roms and push out for OTA. I would like to be on the receiving end. Also, If I need to RMA my phone someday, it will be nice to be able to switch back to stock rom for warranty.
I thought it was easier to switch between models when they were both on the same version of Android. I was wrong.

Hello,
Where can I find the Android 6.0 (B201) for gem-702l ?
Thanks

maskman1 said:
Hello,
Where can I find the Android 6.0 (B201) for gem-702l ?
Thanks
Click to expand...
Click to collapse
http://consumer.huawei.com/tw/tablets/support/downloads/mediapad-x2-tw.htm
Here. But it's for Taiwan gem-702l and it's still a test version, I am not sure if it's applied to other region.
I'll advise you to wait a bit longer for the official version to be out.

Ok, thanks for the input!

How to FULLY convert back to gem-702L.

Updated Nov. 23, 2016:
For 701l users, if you need to downgrade, check out dimitarnc's post of how a 701L downgrading to B005 here
http://forum.xda-developers.com/showpost.php?p=69747367&postcount=6
===========
Gem 702L user's downgrade guide:
For people who want to convert their devices back to 702L and downgrade, there's a way. After Huawei Taiwan releases a downgrade pack, it's actually easy.
Result:
Battery charging is normal.
Debugging mode can be turned on.
Basically everything just working!
You have a functioning stock gem-702L.
Cautions:
1, My device was purchased in Taiwan. All files I used in this process are for TW gem-702l. Please download all the necessary files in TW version, just in case.
2, I am not a dev. I have no ability to help you if you brick your device. You need to consider this before you decide to go ahead.
Alright, here we go.
Preparations:
1. Download 702L downgrade pack (it's only 2 kb): http://download-c.huawei.com/download/downloadCenter?downloadId=81363&version=323452&siteCode=tw
2. Download 702L TW B005 stock firmware(1.25gb): http://download-c.huawei.com/download/downloadCenter?downloadId=59524&version=193667&siteCode=tw
3. Download 702L TW B005 flashable cust zip (Thank ajsmsg78 for making it a while back):https://dl.dropboxusercontent.com/u/19718077/CUST-GEM-702L-D001.zip
4. Download TWRP-ENG-5.0.img (please find it somewhere in the forum).
Process:
1. My device was on 703L Android 5.1.1. I am not sure if you can do it directly from android 6.0, feel free to try or downgrade to B112 stock first.
2. extract boot.img, cust.img, system.img, userdata.img, recovery.img from gem-702l B005 stock rom, and fastboot flash all of them.
Boot up your phone, do minimal setup. Now everything in "About phone" is correct except the internal storage volume.
Do a factory reset and format internal storage. Now everything in "About phone" is correct.
3, optional:
if your "About phone" is all messed up, you need to do this. Otherwise, not necessary for legit 702L devices.
Flash twrp 5.0, then flash gem-702l b005 cust zip. Then flash stock recovery to format your internal storage.
4. Extract files from the downgrade pack. Put the dload directory in your SDcard. Manual update it. It should go through 100%.
(If it fails, that means your system's still on Android 5.1.1, and this method doesn't apply to your device. No need to go any further, just flash back to gem-703L ROMs and stay there.)
6, After the phone boot up, copy the full gem-702l B005 stock firmware to your SDcard, manual update it. It should go through 100%.
Voila! You are back.
Now you are on gem-702L TW B005, You can upgrade to B201 if you want, or flash back to your regional stock rom.
Here's my phone back to gem-702L and upgrade to B201.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

What if I am on Kangvip B211?
Do i have to go back the whole way or can I just put the Rom and the Cust from 702L on my converted 702?
Thx, Ray

RayfG said:
What if I am on Kangvip B211?
Do i have to go back the whole way or can I just put the Rom and the Cust from 702L on my converted 702?
Thx, Ray
Click to expand...
Click to collapse
I'll say it's safer to get back to stock B112 (Android 5.1.1).
you need to do a fastboot flash of B005(android 5.0) imgs during the process. I am not sure if you flash an android 5.0 img in Android 6.0, it won't go into bootloop or something.
It takes certain procedure even for a 703L to go back from 6.0 to 5.1.1, so I wouldn't recommend you to do the fastboot flash directly in Android 6.0.

This is a big effort and i d'ont know, if this fits for the Rom..........
I think i ll stay at Kangvip.
Thy for ur reply.
Greetz, Ray

RayfG said:
This is a big effort and i d'ont know, if this fits for the Rom..........
I think i ll stay at Kangvip.
Thy for ur reply.
Greetz, Ray
Click to expand...
Click to collapse
No problem. This is a backup plan.
Now that there is a safe way to get back, we can switch between 702l and 703l roms anyway we like it.

Getting fastboot error on system.img flashing
load_file : could not allocate -1808753180 bytes

rakesh_4utoo said:
Getting fastboot error on system.img flashing
load_file : could not allocate -1808753180 bytes
Click to expand...
Click to collapse
Change Version ADB.
---------- Post added at 08:28 AM ---------- Previous post was at 08:22 AM ----------
RayfG said:
What if I am on Kangvip B211?
Do i have to go back the whole way or can I just put the Rom and the Cust from 702L on my converted 702?
Thx, Ray
Click to expand...
Click to collapse
You must extract boot.img, cust.img, system.img, userdata.img, recovery.img from gem-702l B112 stock rom, and fastboot flash all of them First.

Great guide. I can see this being useful for anyone wanting to sell their phone and bring it back to stock after they already converted. I'll probably keep mine converted as the same thing with updates will probably happen in the future.
---------- Post added at 01:55 PM ---------- Previous post was at 01:54 PM ----------
rakesh_4utoo said:
Getting fastboot error on system.img flashing
load_file : could not allocate -1808753180 bytes
Click to expand...
Click to collapse
Install TWRP and try wiping system first.

What about the 701?
Would it be converted to 702 that way?
Could we change it to 701 after running downgrade script via fastboot flash b003 files from 701 and dload B003?
My device: 701->703 Kang VIP B209

audioralf said:
What about the 701?
Would it be converted to 702 that way?
Could we change it to 701 after running downgrade script via fastboot flash b003 files from 701 and dload B003?
My device: 701->703 Kang VIP B209
Click to expand...
Click to collapse
I think the trick is how to cheat the System that your device is in certain region for local firmware dload to work.
And that is where editing oeminfo sets in.
For 701L, since there's only downgrade pack for 702L or 703L, you need to downgrade as a 702L or 703L.(I recommand 702L because it's easier)
Now when your are on 702L B005, next step is to edit oeminfo to switch back to 701L.
You need to edit your oeminfo to eu. Then you can flash any Eu firmware, in this case, B003 701L. Then you are back to 701L.
I don't have a 701L so I can't try. but here's an instruction for Huawei devices to switching regions.. You edit your oeminfo to hw/eu(europe), then you can cheat the system that you are now an Europe device. It will let you go through the dloading of B003 for 701L.
Maybe someone wants to give it a try.
If it works, we might not even need that much work to switch between 703L and 702L/701L, we can simply edit our oeminfo and Voila!
(The link is not the original post but a translation. You can go to the OP to check out the necessary files. )
http://forum.xda-developers.com/showpost.php?p=66295992&postcount=8

iamhcg said:
For people who want to convert their devices back to 702L and downgrade, there's a way. After Huawei Taiwan releases a downgrade pack, it's actually easy.
Result:
Battery charging is normal.
Debugging mode can be turned on.
Basically everything just working!
You have a functioning stock gem-702L.
Cautions:
1, My device was purchased in Taiwan. Therefor, all files I used in this process are for TW gem-702l. Please download all the necessary files in TW version, just in case.
I think it works on all 702l devices of other regions (I can't see why not).
2, I am not a dev. I have no ability to help you if you brick your device. You need to consider this before you decide to go ahead.
Alright, here we go.
Preparations:
1. Download 702L TW downgrade pack (it's only 2 kb): http://download-c.huawei.com/download/downloadCenter?downloadId=81363&version=323452&siteCode=tw
2. Download 702L TW B005 stock firmware(1.25gb): http://download-c.huawei.com/download/downloadCenter?downloadId=59524&version=193667&siteCode=tw
3. Download 702L TW B005 flashable cust zip (Thank ajsmsg78 for making it a while back):https://dl.dropboxusercontent.com/u/19718077/CUST-GEM-702L-D001.zip
4. Download TWRP-ENG-5.0.img (please find it somewhere in the forum).
Process:
1. My device was on 703L B112 stock. I am not sure if you can do it directly from android 6.0, feel free to try or downgrade to B112 stock first.
2. extract boot.img, cust.img, system.img, userdata.img, recovery.img from gem-702l B005 stock rom, and fastboot flash all of them.
Let the phone boot into system, do minimal setup. Now everything in "About phone" is correct except the internal storage volume.
3. (I am not sure if this step is necessary but I did it anyway) Flash twrp 5.0, then flash gem-702l b005 cust zip.
4. Flash stock recovery, then do a factory reset and format internal storage. Now everything in "About phone" is correct.
5. Extract dload from the downgrade pack. Put the it in your sdcard. Dload it. It should go through 100%.
(If it fails, that means your system's still on Android 5.1.1, and this method doesn't apply to your device. No need to go any further, just flash back to gem-703L B112 and stay there.)
6, Aftet the phone boot up, copy the full gem-702l B005 stock firmware to your sdcard, then update it by dloading. It should go through 100%.
Voila! You are back.
Now you are on gem-702L TW B005, You can upgrade to B201 if you want, or flash back to your regional stock rom.
Here's my phone back to gem-702L and upgrade to B201.
Click to expand...
Click to collapse
Thanks for outlining the steps - I managed to bring my 702L on 703L-B109 ROM downgrade back to 702L-Taiwan-B005 and then upgrade to 702L-Taiwan-B201 Android 6.0 !!

Guyzz. For those who upgraded their phones to B201 .. do you have any bugs ?
I installed the rooted version on my 701L and it works fine but i have some issues with some web apps .. and i have strange error in the system log ..
Am not sure if that bug exits becuase it's a beta build or just because i converted my phone ..
Does anyone know what's happening
Sent from my GEM-702L using XDA-Developers mobile app

h.jubail said:
Guyzz. For those who upgraded their phones to B201 .. do you have any bugs ?
I installed the rooted version on my 701L and it works fine but i have some issues with some web apps .. and i have strange error in the system log ..
Am not sure if that bug exits becuase it's a beta build or just because i converted my phone ..
Does anyone know what's happening
Sent from my GEM-702L using XDA-Developers mobile app
Click to expand...
Click to collapse
I don't have any problem on my 702L B201
I am on stock rom, rooted it by myself.

Can you just see the system log .. please ??
Sent from my GEM-702L using XDA-Developers mobile app

h.jubail said:
Can you just see the system log .. please ??
Sent from my GEM-702L using XDA-Developers mobile app
Click to expand...
Click to collapse
Sorry I've been playing around different roms so I just switched to 703L B111 near stock. I am not currently on 702L.
But when I was on it, there was one thing. One of my game apps counldn't connect to my Facebook account due to some "Hash key invalid" in B005 firmware, But the problem was solved when I upgraded to B201. Other than that, everything worked fine.

Hello,
now I'm on kangvip 211, can i go back to stock 702L flashing cust, system, boot, userdata... from b202 or I have to do more steps?????
Thanks

up20 said:
Hello,
now I'm on kangvip 211, can i go back to stock 702L flashing cust, system, boot, userdata... from b202 or I have to do more steps?????
Thanks
Click to expand...
Click to collapse
If you want to switch back to stock 702L from 703L roms, you need to do the full downgrade and conversion.

HI all,
i'm stuck at trying to dload the downgrade package. Somehow dload method doesn't startup, no matter which way i try: Updater=> Local Update or Vol Up+Down+Power.
Local updates does nothing and ends up normal boot up after another restart.
Vol up down pwr goes to TRWP.
Any help is appreciated.
Thanks and Regards,
Kevin Chan

I had similar situation and could solve it. I can not exactly remember, but it depends also on which version you were before.
In TWRP do factory reset.
In bootloader mode flash recovery boot and system.img from b112.
After system start do factory reset on EMUI. If system does not start try same with b106 files.
If you are on B112, dload update.app for B211 and then dload update.zip to B211.
In this state the downgrade script may run.
To continue normal install KangVIP or b203 international.
My device: 701->703 B211 xposed 86

iamhcg said:
Updated Nov. 23, 2016:
For 701l users, if you need to downgrade, check out dimitarnc's post of how a 701L downgrading to B005 here
http://forum.xda-developers.com/showpost.php?p=69747367&postcount=6
===========
Gem 702L user's downgrade guide:
For people who want to convert their devices back to 702L and downgrade, there's a way. After Huawei Taiwan releases a downgrade pack, it's actually easy.
Result:
Battery charging is normal.
Debugging mode can be turned on.
Basically everything just working!
You have a functioning stock gem-702L.
Cautions:
1, My device was purchased in Taiwan. All files I used in this process are for TW gem-702l. Please download all the necessary files in TW version, just in case.
2, I am not a dev. I have no ability to help you if you brick your device. You need to consider this before you decide to go ahead.
Alright, here we go.
Preparations:
1. Download 702L downgrade pack (it's only 2 kb): http://download-c.huawei.com/download/downloadCenter?downloadId=81363&version=323452&siteCode=tw
2. Download 702L TW B005 stock firmware(1.25gb): http://download-c.huawei.com/download/downloadCenter?downloadId=59524&version=193667&siteCode=tw
3. Download 702L TW B005 flashable cust zip (Thank ajsmsg78 for making it a while back):https://dl.dropboxusercontent.com/u/19718077/CUST-GEM-702L-D001.zip
4. Download TWRP-ENG-5.0.img (please find it somewhere in the forum).
Process:
1. My device was on 703L Android 5.1.1. I am not sure if you can do it directly from android 6.0, feel free to try or downgrade to B112 stock first.
2. extract boot.img, cust.img, system.img, userdata.img, recovery.img from gem-702l B005 stock rom, and fastboot flash all of them.
Boot up your phone, do minimal setup. Now everything in "About phone" is correct except the internal storage volume.
Do a factory reset and format internal storage. Now everything in "About phone" is correct.
3, optional:
if your "About phone" is all messed up, you need to do this. Otherwise, not necessary for legit 702L devices.
Flash twrp 5.0, then flash gem-702l b005 cust zip. Then flash stock recovery to format your internal storage.
4. Extract files from the downgrade pack. Put the dload directory in your SDcard. Manual update it. It should go through 100%.
(If it fails, that means your system's still on Android 5.1.1, and this method doesn't apply to your device. No need to go any further, just flash back to gem-703L ROMs and stay there.)
6, After the phone boot up, copy the full gem-702l B005 stock firmware to your SDcard, manual update it. It should go through 100%.
Voila! You are back.
Now you are on gem-702L TW B005, You can upgrade to B201 if you want, or flash back to your regional stock rom.
Here's my phone back to gem-702L and upgrade to B201.
Click to expand...
Click to collapse
Hi - I need this stock ROM and can't find a download link anywhere. can you drop it to me? GEM-702L / V100R001C209B005CUS

Update GEM-701 & GEM-702 To Original B201 & KANGVIP B211

0. TWRP - USB DEBBUG - ADB fastboot
0.a Buy Bootload Code from DC-Unlocker (WORD File) to Dropbox. From original post
1 . Install ADB command line in your windows X
2.a. Download GEM 701L B003 for GEM 701L via ADB
2.b. Download GEM 702L B003 for GEM 702L via ADB
3. Extract with HuaweiUpdateExtractor in UPDATE.APP
these files system.img, cust.img, boot.img, userdata.img, recovery.img.
4. boot into bootloader (Power+VOL down, USB Cable connected) & go to adb command line type ->
fastboot flash system system.img
fastboot flash cust cust.img
fastboot flash boot boot.img
fastboot flash userdata userdata.img
fastboot flash recovery recovery.img
fastboot reboot
5. Your device is clean and Origin ROM From Huawei.
6. Download & put dload in your SDCARD
6.1 dload -> 5GOTO6
- FLASH IT via Updater (from settings Localy) & it should done 100% & go options look and verify build number
6.2 dload -> GEM-702LV100R001C209B005CUSTC158D001
- FLASH IT via Updater (from settings Localy) & it should done 100% & go options look and verify build number
6.3 dload -> X2升级包 for GEM-702LC158B201
- FLASH IT via Updater (from settings Localy) & it should done 100% & BOOTLOOP !!!
6.4 PUT IN YOUR SDCARD -> dload from GEM-702LC158B201
6.4A -> Insert your SDCARD and Reboot and PRESS VOL+ and VOL- at the same time
6.4B-> HUAWEI UPDATE, it should done 100% & go options look and verify build number
6.5-> Your phone is B201 (marsmallow) official and WIFI & Bluetooth is okay !
6.6-> Install TWRP6.0
fastboot flash recovery TWRP-ENG-6.0.img
fastboot reboot
PRESS VOL+ and VOL- at the same time
Download -> [ROM] [6.0] KangVIP Slim B211
Put in your Sdcard & install
Wipe -> Swipe to Factory Reset
Reboot
7. Finish all it's okay :good::good::good::good: on my GEM 701-L & 702-L ps : thank you for your opinions

did anyone tried this method?
Sent from my GEM-701L using XDA-Developers mobile app

Rhonald said:
did anyone tried this method?
Sent from my GEM-701L using XDA-Developers mobile app
Click to expand...
Click to collapse
Nice and clear tutorial with all what is needed to successful update. If you proceed it should work without flaw.

I would Not recomnend that. This way will erase the fitting cust on 701 models. I don't think the cust it's a nice goiter which we can replaced by a randomly selected one. Why do you think the device runs in bootloop on this guide?
This is more complicated than the way AJ figured out.
The 'universal cust 112' is the key.
I did it on 3 devices now with 100% success in dload and no bootloops.
2 factory resets and 3 dloads (106 112 and 209) are necessary.
Then install 202 or 211 KangVIP from AJ to have a full functional rooted ROM with your origin cust you came from.
My device: 701->703 B211 xposed 86

Hi me device is gem 701L convert to 703L B111 nearstock. I installed successfully B211 . after the restart of the Huawei logo on the left . and nothing is happening . i dont understand what's wrong .Finally, I rebooted the fastboot mode.nainstaloval I TWRP and then installs kangvip slim 6 . ok. Only is not working bluetooth and wifi. How do I get it right ? Any Some will not destroy my gem- 701 l ( 703 l )

audioralf said:
I would Not recomnend that. This way will erase the fitting cust on 701 models. I don't think the cust it's a nice goiter which we can replaced by a randomly selected one. Why do you think the device runs in bootloop on this guide?
This is more complicated than the way AJ figured out.
The 'universal cust 112' is the key.
I did it on 3 devices now with 100% success in dload and no bootloops.
2 factory resets and 3 dloads (106 112 and 209) are necessary.
Then install 202 or 211 KangVIP from AJ to have a full functional rooted ROM with your origin cust you came from.
My device: 701->703 B211 xposed 86
Click to expand...
Click to collapse
Perhaps indeed it replaces information of 701, I am not a specialist.
The bootloop when its causes are on both models 701 & 702.
Despite this my tutorial that my 701 & 702 work perfectly with the wifi and bluetooth.
I do not question the quality nor the audioralf skills,
I just shared my tutorial after many trials of other tutorials that never It Works for me.

Well you link files you don't write where you got them from and don't write for wich model they are made for and what are requirements they based on.
Maybe it works, but it's a risk to continue on a bootloop with further installations.
The regular way works without errors.
If someone is looking for another dirty short way :
Simply run the official downgrade script from 6.0 to 5.0. for 702.
It even runs on a 5.0 701 model.
After this it behaves like a 702.
Then you can dload the regular update to 6.0 for 702 models.
After this flash TWRP 6.0 and install AJ b211
This method is also dirty because you loose the 701 cust for your region and hardware
This may be have consequences we don't know.
So better go the regular way AJ had figured out and ask in forum if you habe problems.
My device: 701->703 B211 xposed 86

B111 SimpyGoogle => KANGVIP B211 link?
Hi Audioralf,
thanks for pointing this out. I followed your great guide and got to SimplyGoogle B111 on a GEM-701L. (You updated it with a shortcut to B111, which worked just fine. Some lines in the guide are a bit misleading due to the newer shortcut but all is great).
Now I'd love to get to KANGVIP B211 on Android 6. But how do I get there from B111? I can't find AJs guide you pointed out in your comment. Could be please post a link? (I have searched but without success).

I succeeded
Rhonald said:
did anyone tried this method?
Sent from my GEM-701L using XDA-Developers mobile app
Click to expand...
Click to collapse
I did succeeded with a mixture of both methods.
I started off following the "original version" of AJ and when I never got into upgrading into 6 I decided to stay at Near...B111.
When I saw Oblemay's tuto I decided to try it. Funny enough, coming from B111 I (701l > 703l) I never got the boot loop!
Also, since I was not able to unpack the rar file from step 6.2 I simply ignored this one and continued with 6.3.
Guess what it worked perfectly. Only issue was unstable wifi until I did a factory reset from within 211 (not TWRP)!
I am very happy with my former 701l now on Marshmallow. Thanks to AJ and Oblemay - Maybe it worked for me with Oblemay's (reduced) version as I also live in France .... Do you also have problems with the mail app in 211?

So can anybody provide clear instructions or links which work for 701 on b003? I am really confused right now, because their are so many Different Methods/Versions..

HTML:
Chris0706 said:
So can anybody provide clear instructions or links which work for 701 on b003? I am really confused right now, because their are so many Different Methods/Versions..
Click to expand...
Click to collapse
+1
It could be really good to have some clear way... Actually I was asked about such process by one of russian friends who own GEM701 and do not uderstand nothing, specially using Google translator . As I am owner of GEM703L I am not familiar with 701 ways... But I want to help my companion...

getoliverleon said:
Hi Audioralf,
thanks for pointing this out. I followed your great guide and got to SimplyGoogle B111 on a GEM-701L. (You updated it with a shortcut to B111, which worked just fine. Some lines in the guide are a bit misleading due to the newer shortcut but all is great).
Now I'd love to get to KANGVIP B211 on Android 6. But how do I get there from B111? I can't find AJs guide you pointed out in your comment. Could be please post a link? (I have searched but without success).
Click to expand...
Click to collapse
Do you still need help? I did not see your comment.
The way from 112 to 212 is described many times: Just flash boot, system and recovery from b112. Start system and do a factory reset. Then the update.zip of 211 can be started via firmware update menu. (Select partitionally update)
Then install TWRP and AJ KangVIP 211
My device: 701->703 B211 xposed 86

trurl3 said:
HTML:
+1
It could be really good to have some clear way... Actually I was asked about such process by one of russian friends who own GEM701 and do not uderstand nothing, specially using Google translator . As I am owner of GEM703L I am not familiar with 701 ways... But I want to help my companion...
Click to expand...
Click to collapse
If someone is interested in rooting method of GEM702 with stock B202 ROM. As i wrote one of my koleauges want to root. I was asking in PM @audioralf and @ajsmsg78. Finally using all advices rooting was done successfully by this method (unit should be unlocked and TWRP installed):
1. Copy to root of SD BETA-SuperSU-v2.67-20160121175247.zip
2.Boot to TWRP and before installing SuperSU go to Advanced->Terminal and execute command "echo SYSTEMLESS=true>>/data/.super.su" (without quotes).
3. Not leaving TWRP install SuperSU from SD.
@ajsmsg78 has some comments concerning rooting with systemless supersu:
ajsmsg78 said:
Just flash SuperSU 2.78 in twrp. My roms are already rooted if he wants to go that route but I wouldn't use systemless root on the X2 as it causes app freezing issues. It's something with Huawei's kernel.
Click to expand...
Click to collapse
Now we will see. My companion will testing his installation and report back. if the method proves to be flawless @ajsmsg78 could use it in his ROMs....
EDIT// Unfortunately friend reports so this method gives not fully working root.

Still waiting a clear way to convert GEM-701L B001 to GEM-703L

If you are on b001, try to
flash TWRP always on recovery2 partition:
Fastboot flash recovery2 twrp_eng_5_0.img.
So you can keep the device usb connected.
Then install universal cust mod 112.
Always put update.app file to dload folder on external sd. Always exchange the file within this folder on the next steps.
Start with dload process for B003, if you are on Android 5.0 but boot not on B003.
Start system and select firmware update and press local update to select full update to B003
If you are on b003, then
- flash TWRP eng for 5.0 and install universal cust mod 112
Start in bootloader mode and flash the 015 system, boot and recovery.img
Start system and do reset on EMUI.
Then flash TWRP and install universal cust mod 112 again and start dload with b106 update app
Now start system and repeat reset on EMUI including format internal sd.
Flash TWRP FOR 5.11 and Install again universal cust mod 112 and start dload via EMUI with update.app from b112.
Start system and then start local update with incremental update.zip for 211 in dload folder
Finally install TWRP for 6.0 and install
kangvip 211
My device: 701->703 B211 xposed 86

It fails to update to B003 maybe because of the Region/Vendor.
My Build number is GEM-701LV100R001C199B001

Is it possible to change the Region name or the Vendor?

try if it works, if you install universal cust b112 before b003 dload.
My device: 701->703 B211 xposed 86
---------- Post added at 04:00 PM ---------- Previous post was at 03:05 PM ----------
I have updated the guide in #15
My device: 701->703 B211 xposed 86

Thank you for your time. Will try that later because this is a busy week for me at the office.

Can't flash the TWRP.
Do I have to root first?

dload Update.app method, entering TRWP instead

Hey Guys..
Bought a L29 Mate 8 last week, have been able to unlock, root but now want to install some custom roms..
The installations instructions tell me to go (back) to a stock B1xx rom through the "dload method", and next upgrade to a stock B3xx rom through the "dload" method.
I'm running stock B170, rooted/unlocked right now.
I've loaded a stock B3xx update.app file on my phone, but i'm unable to get the phone to run this update, it either boots normal to system, or when I use vol+/vol-/power it boots into TRWP instead.
Other instructions mention a setting to run update manual going through settings/update but can't find a "manual update"" setting there.
Hope you guys can help me going with this one...
Thanks

You need to flash stock recovery back,use srk tools.

gm007 said:
You need to flash stock recovery back,use srk tools.
Click to expand...
Click to collapse
Thanks for your quick reply, still a little lost here, will give that a try..
Thanks

Regan078 said:
Thanks for your quick reply, still a little lost here, will give that a try..
Thanks
Click to expand...
Click to collapse
That did the trick, it will "force" manual update now.
Now I run in another problem though, stock rom links for my "NXT-L29C636" are not available, link for C185B170 was still working and the only B320 stock i could find was the one shared by user "bluheart" in his signature "C185B320"
So decided to rebrand the device to C185 with SRK Tool so I would be able to flash these stock roms, first flashed C185B170 through dload method with no problem, and from there tried to flash C185B320 but update does not get passed 5%.
The rom version listed in the device is somehow NXT-C900B170, using the "* # * # 2846579 # * # *" code in dialer confirms phone is "C185 - Africa / Middle East"
Any pointers ?
(edit: tried to reflash C185B170 through download method, also gets stuck @5%)
Thanks

Now in about phone it show C900B170?
Can you get an ota update via updater?
The latest c185B200 so start from this one.
http://update.hicloud.com:8180/TDS/data/files/p3/s15/G1076/g104/v65326/f1/full/update.zip
Or you need to root B170 and change build display and oem info to C185 in srk tools.after this you will be able to dload c185b320

gm007 said:
Now in about phone it show C900B170?
Can you get an ota update via updater?
The latest c185B200 so start from this one.
http://update.hicloud.com:8180/TDS/data/files/p3/s15/G1076/g104/v65326/f1/full/update.zip
Click to expand...
Click to collapse
Thanks again for your help...
Used SRK Tools to change ROM version from "NXT-C900B170" to installed "NXT-L29C185B170" in the hope this miss match prevented the update, no luck, also no OTA available.
Thanks for the link, will download this and try to get this going first...
(edit: Changing OEM, SRK Tools read the device as AL-10?, changed to C185, fingers crossed)

Regan078 said:
Thanks again for your help...
Used SRK Tools to change ROM version from "NXT-C900B170" to installed "NXT-L29C185B170" in the hope this miss match prevented the update, no luck, also no OTA available.
Thanks for the link, will download this and try to get this going first...
Click to expand...
Click to collapse
Yes flash b200 like you are debranding,I mean change build prop display and oem info to c185.
ro.build.display.id=NXT-L29C185B002

gm007 said:
Yes flash b200 like you are debranding,I mean change build prop display and oem info to c185.
ro.build.display.id=NXT-L29C185B002
Click to expand...
Click to collapse
Had no luck with the C185 roms, they all got stuck at 5%, decided to rebrand back to C636 and dload the original NXT-L29C636B170 and that worked, so will create a TRWP backup from here to fall back on.
Will give the rebranding to C185 another try later, with the rom you provided (i wonder if i went wrong somewhere with all rom downloads named "Update.zip" I might have mixed something up)
Maybe you/anybody confirm I take the right steps to rebrand to C185 and update to the NXT-L29C185B200 ROM provided.
Using SRK Tool: (current: NXT-L29C636B170/Rooted/Bootloader Unlocked)
1-Install TRWP
2-Change OEM from C636 to C185
3-Change ro.build.display.id=NXT-L29C636B170 to NXT-L29C185170 or NXT-L29C185B200 ?
4- Copy NXT-L29C185B200 "update.app" to device/dload
5- Install Original Recovery
6- Use vol+/vol-/power to apply B200 update
8-Install TRWP/ create Backup
9- Root ?
10- Copy NXT-L29C185B320 "update.app" to device/dload
11- Install Original Recovery
12- Use vol+/vol-/power to apply B320 update
Thanks in advance....

Debranding

anyone tell where to email for bootloader unlock if website is not recognizing my phone.
updated to B200

Thanks for your help gm, just made a new attempt and now successfully picking up the updates as a C185.
Getting ready for a custom rom