How To Guide ENABLE DUAL SIM ON TMO 9 PRO ONLY!!!

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Mar 10, 2019
14
1
Who is the dual sim working with him?
Please help us...
Always getting unstable dual sim first work (or one sim work with magisk data fix module)
 

EtherealRemnant

Senior Member
Who is the dual sim working with him?
Please help us...
Always getting unstable dual sim first work (or one sim work with magisk data fix module)
You are doing something that isn't officially supported, you should expect issues. If you want perfection, you should pay more for a device that has what you want out of the box.
 
Mar 10, 2019
14
1
I wasn't buy this until reading this thread saying 100% working... So now I flower my self for buying it... Now I hope to get dual sim working with me?
Thanks for your reply
And I will keep your advice in my mind
 
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Mr Hassan

Account currently disabled
Feb 14, 2016
934
62
OnePlus 10 Pro
lemme relive again this thread with some more info
method1
i got 2 sim slots but 2nd sim not reconized
method 2
i got dual sim working but if you reboot device or reinsert sim then imei will be null so you need to connect wifi
to fix that issue
so if anyone can discuss more about this plz share your exprince
 
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Danial Ahmad

Member
Feb 4, 2013
23
3
lemme relive again this thread with some more info
method1
i got 2 sim slots but 2nd sim not reconized
method 2
i got dual sim working but if you reboot device or reinsert sim then imei will be null so you need to connect wifi
to fix that issue
so if anyone can discuss more about this plz share your exprince
Can you share your method 2 and did you het fix for null issue? I am on android 13 btw and my mobile shows 2 sim but i cant get to recognize 2nd sim
 

Watcher505

Member
Sep 27, 2008
12
2
3 forking days i try to do this and i win. i cannot flash a12 d1 by Ota (install failed on 0%, i dont know why), but today i flash it by TWRP ( and got restarting every 30-60 seconds), then OB1 by TWRP, reflash OB1 by ota, wiping data and i see 2 sim, #2 is not active. after that, I just wanted to throw this phone away. But I decided to just return the Eu firmware via TMO-EU. i do it. then 2 uprades to A12 by OTA and i see 2 working sim!!!! It's just incredible and damn nice)
 
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Watcher505

Member
Sep 27, 2008
12
2
Write by steps what i do (i do it twice and both times its work) may be some steps was excess (for exemple 12, 15, may be 7). In step 17 as i think you can flash global firmware (after all i reflash to global c47 by OTA. and now im on global c66) :

  1. I backed up my modem_a, Modem_b modemdump, modemst1 and modemst2 partionts from my stock T-mobile rom
  2. I used this procedure to convert LE2127 to eu 11.2.2.2 including flashing NON-HLOS.bin provided.
  3. I unlocked the bootloader
  4. As the procedure required 11.2.8.8 I installed this OTA: OnePlus9ProOxygen_22.E.11_OTA_0110_all_2107082125_d0bd7d565
  5. flashing tmo modem flasher 8.8 in fastboot.
  6. I applied this OTA LE2125_11_C_OTA_1230_all_a88473_10100001
  7. I applied script OB1ONECLICK ROOT from topic. save some partitions.( i think its no nesessary, do it in p.1)
  8. Same as p.2, 3, 4.
  9. I cannot install OTA A12 D1 VARIANT ( update failed on 0%) and install it by loading twrp from fastboot by "fastboot boot twrp.img" and then flashing A12 D1 VARIANT.
  10. I hist reboot and immediately installed the sim tray with 2 sims
  11. It started and rebooted immediately, It rebooted several times sometimes after minutes.
  12. install LE2120_11_C_OTA_1020_all_b0b4f9_00011011 by loading twrp from fastboot by "fastboot boot twrp.img" and then flashing. i do this because download firmware early (its same developer a12 dp1 with hotfix). may be not nesessary
  13. It started and rebooted immediately, It rebooted several times sometimes after minutes.
  14. install LE2125_11_C_OTA_1230_all_a88473_10100001 by loading twrp from fastboot by "fastboot boot twrp.img" and then flashing LE2125_11_C_OTA_1230_all_a88473_10100001. switch on wifi. in this step i see 1 working sim and 1 disabled sim in settings after reinsert simtray (wait for 2-3 min.)
  15. Reflash by OTA LE2125_11_C_OTA_1230_all_a88473_10100001 (install and do wipe data). see only 2 disabled sims.
  16. same p.2,3, but without flashing NON-HLOS.bin
  17. system update by ota to 11.2.10.10 and then to le2123_11_c.47 both downloading by system
  18. 2 hours of life go to hell and 2 sims working.
 

Appreciative

Senior Member
Mar 6, 2015
210
120
Write by steps what i do (i do it twice and both times its work) may be some steps was excess (for exemple 12, 15, may be 7). In step 17 as i think you can flash global firmware (after all i reflash to global c47 by OTA. and now im on global c66) :

  1. I backed up my modem_a, Modem_b modemdump, modemst1 and modemst2 partionts from my stock T-mobile rom
  2. I used this procedure to convert LE2127 to eu 11.2.2.2 including flashing NON-HLOS.bin provided.
  3. I unlocked the bootloader
  4. As the procedure required 11.2.8.8 I installed this OTA: OnePlus9ProOxygen_22.E.11_OTA_0110_all_2107082125_d0bd7d565
  5. flashing tmo modem flasher 8.8 in fastboot.
  6. I applied this OTA LE2125_11_C_OTA_1230_all_a88473_10100001
  7. I applied script OB1ONECLICK ROOT from topic. save some partitions.( i think its no nesessary, do it in p.1)
  8. Same as p.2, 3, 4.
  9. I cannot install OTA A12 D1 VARIANT ( update failed on 0%) and install it by loading twrp from fastboot by "fastboot boot twrp.img" and then flashing A12 D1 VARIANT.
  10. I hist reboot and immediately installed the sim tray with 2 sims
  11. It started and rebooted immediately, It rebooted several times sometimes after minutes.
  12. install LE2120_11_C_OTA_1020_all_b0b4f9_00011011 by loading twrp from fastboot by "fastboot boot twrp.img" and then flashing. i do this because download firmware early (its same developer a12 dp1 with hotfix). may be not nesessary
  13. It started and rebooted immediately, It rebooted several times sometimes after minutes.
  14. install LE2125_11_C_OTA_1230_all_a88473_10100001 by loading twrp from fastboot by "fastboot boot twrp.img" and then flashing LE2125_11_C_OTA_1230_all_a88473_10100001. switch on wifi. in this step i see 1 working sim and 1 disabled sim in settings after reinsert simtray (wait for 2-3 min.)
  15. Reflash by OTA LE2125_11_C_OTA_1230_all_a88473_10100001 (install and do wipe data). see only 2 disabled sims.
  16. same p.2,3, but without flashing NON-HLOS.bin
  17. system update by ota to 11.2.10.10 and then to le2123_11_c.47 both downloading by system
  18. 2 hours of life go to hell and 2 sims working.
Steps 17-18, did you notice if both sims worked while on 11.2.10.10 or was updating to c.47 necessary?
 

Danial Ahmad

Member
Feb 4, 2013
23
3
on a11 work only 1 sim. dual sim im starting see only on A12. now im at A13 (on global f16) and its work too!
P.S. worked... and then i perform wipe data... and now all again(
I am on global f16 all i see is no sim card for 2nd sim btw is your imei 1 and 2 same?
 

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Danial Ahmad

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  • 1
    Write by steps what i do (i do it twice and both times its work) may be some steps was excess (for exemple 12, 15, may be 7). In step 17 as i think you can flash global firmware (after all i reflash to global c47 by OTA. and now im on global c66) :

    1. I backed up my modem_a, Modem_b modemdump, modemst1 and modemst2 partionts from my stock T-mobile rom
    2. I used this procedure to convert LE2127 to eu 11.2.2.2 including flashing NON-HLOS.bin provided.
    3. I unlocked the bootloader
    4. As the procedure required 11.2.8.8 I installed this OTA: OnePlus9ProOxygen_22.E.11_OTA_0110_all_2107082125_d0bd7d565
    5. flashing tmo modem flasher 8.8 in fastboot.
    6. I applied this OTA LE2125_11_C_OTA_1230_all_a88473_10100001
    7. I applied script OB1ONECLICK ROOT from topic. save some partitions.( i think its no nesessary, do it in p.1)
    8. Same as p.2, 3, 4.
    9. I cannot install OTA A12 D1 VARIANT ( update failed on 0%) and install it by loading twrp from fastboot by "fastboot boot twrp.img" and then flashing A12 D1 VARIANT.
    10. I hist reboot and immediately installed the sim tray with 2 sims
    11. It started and rebooted immediately, It rebooted several times sometimes after minutes.
    12. install LE2120_11_C_OTA_1020_all_b0b4f9_00011011 by loading twrp from fastboot by "fastboot boot twrp.img" and then flashing. i do this because download firmware early (its same developer a12 dp1 with hotfix). may be not nesessary
    13. It started and rebooted immediately, It rebooted several times sometimes after minutes.
    14. install LE2125_11_C_OTA_1230_all_a88473_10100001 by loading twrp from fastboot by "fastboot boot twrp.img" and then flashing LE2125_11_C_OTA_1230_all_a88473_10100001. switch on wifi. in this step i see 1 working sim and 1 disabled sim in settings after reinsert simtray (wait for 2-3 min.)
    15. Reflash by OTA LE2125_11_C_OTA_1230_all_a88473_10100001 (install and do wipe data). see only 2 disabled sims.
    16. same p.2,3, but without flashing NON-HLOS.bin
    17. system update by ota to 11.2.10.10 and then to le2123_11_c.47 both downloading by system
    18. 2 hours of life go to hell and 2 sims working.
    man of man finally i have complete all your steps and have dual sim active thanks.. one question can i update to the latest simple ota way and can i wipe factory reset ?
  • 6
    Frist off I'm not Responsible for anything that happens to your phone!!!


    THIS HAS BEEN TESTED AND WORKING 100% ON TMO 9PRO LE2127!!ALSO MODEM RETENTION.

    (THIS IT NOT FOR THE UNLOCKED 9PRO LE2125)


    DO THIS AT YOU OWN RISK!!


    THIS METHOD IS 100% WORK FOR TMO 9PRO USER!!!

    I HAVE NOT GOT A CHANCE TO GET IT STABLE ON OOS A11 YET!!


    MUST HAVE REQUIREMENTS!!
    Dual Sim
    (Tray Amazon where I got mine)

    2 ACTIVE SIM CARDS
    YOUR PHONE MUST BE SIM UNLOCKED!!
    BACKUP YOUR EFS(IMEI)FOR SAFE MEASURE!
    UNLOCK TOKEN IS ALWAYS HANDY! NOT REQUIRED THO!

    MUST BE ON OOS 11.2.8.8. NA OR EU 11.2.8.8 TO START THE PROCESS


    PLEASE FOLLOW THIS TO THE T!!AS THIS
    METHOD IS TESTED AND WORKING 100% FOR TMO 9PRO!! ONLY!!!

    UNLOCK BOOTLOADER ON OOS 11

    NOW UPDATE TO YOU FLAVOR OF A12 DP2 OR OB1
    ROOT AND BACK YOU INFO IMEI AND SUCH WITH ONLY ONE SIM IN THE DEVICE
    USE THIS APP PARTITIONS BACKUP IN PLAYSTORE


    I HAVE ATTACHED A ONE-CLICK ROOT FOLDER FOR OB1
    BELOW

    ENABLE USB DEBUGGING RUN SCRIPT

    IT WILL REBOOT WHEN DONE

    ONCE DONE PUT IT SOMEWHERE SAFE!!

    TAKE SIM TRAY OUT OF THE DEVICE

    MSM TOOL BACK TO OOS 11.2.8.8 NA OR EU

    PLACE THIS (
    A12 D1 VARIANT) ON TO YOU DEVICE


    NOW LOCAL UPGRADE DURING THIS PROCESS LEAVE SIM TRY OUT

    ONCE IT STATES REBOOT CLICK IT AT THIS POINT INSERT SIM TRY

    ONCE DEVICE REBOOT YOU NOW WILL SEE DUAL SIM IS ENABLED


    NOW TO MAKE IT STICK PERMANENTLY!

    IN THE FILE LINK I PROVIDE GRAB THE OXYGEN UPDATER APK

    INSTALL SELECT YOUR FLAVOR OF A12 OB1 OR DP2 WHICH EVER ONE THAT YOU BACKED UP YOU INFO ON

    DOWNLOAD AND LOCAL UPDATE

    YOU MIGHT START TO BOOTLOOP ON REBOOT IF SO

    HOLD POWER AND VOLUME DOWN ENTER RECOVERY AND WIPE DATA
    REBOOT


    NOW ON REBOOT YOU SHOULD SEE DUAL SIM WORKING
    IN THE REAR INSTANCE THAT YOU REBOOT AND ITS NOT WORK


    PLEASE CHECK IF IT READ IMEI BY TYPING *#06# OR IN THE ABOUT SECTION IN SETTINGS
    IF IT STATS NULL
    IF SO TRY STEPS BELOW

    PLEASE REMOVE SIM TRAY AND CONNECT TO WIFI AND REINSTALL SIM TRAY AND CHECK
    YOUR IMEI IS STILL THERE 100%
    ITS A OB1/DP2 GLITCH WITH ARE DEVICE MODEL!

    WAIT A COUPLE MINUTE AND REBOOT

    FLASH TMO TO EU MSM TOOL
    YOU IMEI AND SIGNAL WILL BE WORK FINE



    (ALSO DO THIS IF YOU WANT TO RELOCK YOUR BOOTLOADER )

    THE LOCAL UPDATE BACK TO A12 AN IT SHOULD BE ACTIVE

    NOW ITS PERMANENT ON A12
    YOU CAN
    DOWNGRADE BACK TO OOS 11 BUT IT WILL NOT SHOW!!
    IM WORKING ON THAT!!






    If You Would like to Donate
    For the work I have done
    I say thank you

    SPECIAL THANKS TO MY TESTER

    crackerjack9249 LE2127

    Libra420T LE2127

    LE2125 WILL NOT SUPPORT!!
    3
    It's funny how this thread is going. I'm pretty sure on other thread that, y'all were asking for release.... knowing we haven't got it 💯.... Explaining that more tests were needed. Working great on TMO variant. All this crap, this is exactly why we didn't want to release. but u push & push and now you have issue either way 🤦‍♂️

    WE would never release something that would hurt device!​

    That was/is the whole point of testing..
    3
    [Mod Note]

    Hi everyone! Strong opinions and at some points walking the line of our forum rules so let's cool down for a bit.
    We of course share our members' concern for the 'health' of their devices but let's not forget the nature of XDA. Everything here is shared as is. The use of mods/ROMs/kernels/etc. always comes with a risk. I believe this is properly outlined in the OP here.
    Let's please just focus on the goal we all share here: improving functionality. It's no point to dwell on the same principles over and over. Only working together as a community will yield desired results. If a publisher does not wish to disclose methods used, however, that is their right. With some exceptions such as kernels and recoveries. That said, we do prefer to see the spirit of open source spread across our platform. We're a huge fan of sharing!

    I'd like to add that the discussion here does have a lot of great aspects and has been conducted in a mostly civil way. Thank you for that! Therefore I do not see the need to perform any 'clean up in aisle 4!'. I'm sure you all said what needed to be said so it may be a good moment to move on before things escalate. If anyone still feels the undying urge to continue discussing, click here and knock yourself out (please be nice).

    Thank you all for listening and have an amazing weekend!
    Timmy
    Forum Moderator
    3
    I'm interested in this as well, but it seems the folks who worked on this don't want to share any specifics of how this was accomplished. Great that it works, though.

    I started to do this because I do need dual sim functionality, but personally I'm not very comfortable flashing something blindly without having any idea what was actually changed in the zip I'm flashing (especially when it's potentially risky), so I haven't done it yet. As a Linux admin of 15+ years I like to see the inner workings of these things and the code/system changes, so I can make an informed decision. That's what I like about the community here at XDA, we can learn from each other.
    this is very sad


    frist this is why i didn't want to release
    Since the beginning, I was asking in the other thread HOW it was accomplished (knowledge-sharing), not for anyone to give me something to flash. But no one was interested in answering questions or sharing information, just "we'll test it and then release it". I was hoping that meant release actual details, but no one is even willing to answer basic questions about what was changed in that zip we're supposed to flash.

    It's fine if you don't want to help people learn and you'd rather just keep your secrets to yourself, but for me, sharing knowledge with one another is what XDA community is all about. That's literally the only reason I'm here, to learn and to help others learn.
    Well the issue is
    My LE2125 tester really didn't do much as in reporting!
    An 2nd
    Iv told you when this 💯 working
    I make a full post on how this was accomplished
    But is not fully working LE2125!

    I'm not keeping anything to my self so please stop accusing me of this!
    If you look at all my other post
    Once I fully test and make sure it working
    I go into detail on how I did that project

    I have also all your question are how did I do this
    I killed a drive the first time I tried
    Also I've learned some N user wil take that info an try to recreate it on there own an mess there Device up! N USER have a tendency to do what they want and I'm not going to be held responsible nor have that way on my mind because you won't answers that I'm not willing to give out to the public at this point in time I've repeated myself multiple times and it is unacceptable for you not my fault

    So please if you here to put down my work or try to cause trouble
    Hop off my post!!

    An don't flash it.
    Not my fault you got a device that you cant use they way you need!
    15+ Linux admin you like to know information lol
    Didn't do enough research on that now did you!
    3
    Wow i have a le2125 and i am tempted to try. Just out of curiosity, what files or partitions are you changing to achive this dual sim mod? I was always curious about how they locked it on 9 pro
    Well for one I wouldn't call this a mod
    as this doesn't get removed even after msm tool flashing stock Especially for TMO LE2127 witch normally kills mdm retention that this technically "MODIFYS" as you would say mod for the TMO le2127
    for the TMO 9pro the effect is different then to the NA le2125
    as I only had one test for that device that really didn't give much feed back other then it worked for them and screen shots

    as where had 2 great tester on TMO plus my self to test the many why to get this to work!!

    also as I have not got it stick on oos A11
    I consider this is still under testing and will not release anything more then what I have
    Due I'm not going to have ppl killing there phone or turning them in to paper weight like I did
    also I only released this due to other's bugging and blowing up here and telegram nonstop
    Once I should that I got it working