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Does T-Mobile OP8 5G Support Dual-Sim if on Global Firmware?

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haseebali55554

Senior Member
Oct 22, 2015
58
6
islamabad
OnePlus 8

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acostmisa

Member
Apr 7, 2016
27
1
I have followed all the steps and I even changed the imei and the sim2 still does not get signal. i have installed, India, EU and Global rom and nothing
 

acostmisa

Member
Apr 7, 2016
27
1
As you can see it recognize the sim2 but not get signal
Screenshot_20210929-090731.jpg
 

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  • 1
    Did you try using 2 sim cards ? Both working fine ? If yes, please share the guide with us. Thanks.
    1. First of all unlock bootloader and u also have permanent sim unlock from t-mobile.
    2.After unlocking your phone will restart, setup your oneplus 8 and enable developer mode and in developer mode enable "usb debugging" .
    Note: You must have working adb/fastboot drivers.
    3. now restart your phone to bootloader.
    4. Download any android 10 fastboot Rom from xda developer.
    "I have tested this : https://sourceforge.net/projects/fastbootroms/files/OnePlus 8/10.5.9-EUROPE-OnePlus8Oxygen_15.E.18_OTA_018_all_2007160043_913306-FASTBOOT.zip/download
    4.1. For flashing this rom your phone has to be in fastboot mode.
    5. After downloading extract the rom and open extracted folder and double click "flah_all.bat
    5.1.connect your phone to computer in fastboot mode and enter "Y"
    wait for 5 to 7 minutes, in this process your oneplus will restart to recovery mode but never unplug the cable or use your phone during installation.

    Note: i have tested dual sim with dual sim tray.
    1
    That's so weird. I flashed the same version if EU ROM but didn't get dual SIMs. Do you remember which version if TMO ROM before flashing EU.10.5.9?
    Thanks
    Brother after flashing eu10.5.9 just update your OnePlus to latest 11.0.8.8 (because dual sim compatibility is only available in android 11/oxygen 11) and then lock the bootloader after locking your phone will rest and u will see dual sim compatibility after setup.
    Maybe looks wired but works for me
    1
    Our government block unpaid IMEI numbers so we change IMEI number of our phone with paid one
    Haseeb I'm from pakistan can i have you number, email or any kind of contact so I can contact you directly. Please 🙏 🥺