T-Mobile OnePlus 8 Conversion to Unlocked Firmware

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ihatejunk

Member
Dec 7, 2010
6
0
AFter flashing Global ROM on my Oneplus 8 and relocking the bootloader... SIM2 will show up. My question now is if I buy a dual sim tray will I be able to get sim 2 working?
 

mohsinnaqvi

New member
Apr 1, 2023
2
0
So I've successfully unlocked the bootloader of my T-Mobile OnePlus 8, and I was wondering if there was any way to convert it to the Global OxygenOS firmware? And if something goes wrong, is there any way to flash back to the T-Mobile firmware? I haven't been able to find any threads relating to this subject.
Can you guide me how to unlock without token
 

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    So I've sent my imei number to someone from this site promising that they can install the OnePlus 8 international OXYGEN OS on my phone just from the imei number.. Just trying to figure out can this be done or have I been had... They claim it takes 30 mins but it's been over a day already and nothing...


    Did you seriously, really, share your IMEI with someone you didn't know?

    Better exchange your phone now cause I wouldn't even touch that thing after that.

    Call TMobile and make up a story about it not turning on or something. Or kill it via root and say it won't boot up
    2
    So I've sent my imei number to someone from this site promising that they can install the OnePlus 8 international OXYGEN OS on my phone just from the imei number.. Just trying to figure out can this be done or have I been had... They claim it takes 30 mins but it's been over a day already and nothing...


    You've most likely been scammed. There is a thread over in the Guides section on how to convert the T-Mobile OP8 to the global firmware but it's still a work in progress. Right now it requires the bootloader to be unlocked and the use of the MSM tool to downgrade the stock firmware first. I don't believe there's a way to do that remotely just from the IMEI.

    Please be careful sharing information about your device online, and check your sources ?
    1
    If you gave someone your IMEI number you have lost more than $50. You've probably lost your phone.
    1
    So I've sent my imei number to someone from this site promising that they can install the OnePlus 8 international OXYGEN OS on my phone just from the imei number.. Just trying to figure out can this be done or have I been had... They claim it takes 30 mins but it's been over a day already and nothing...
    I agree. You should send the phone back to tmo and request a new one. That way you don't have to worry about anything. That would be the best way and don't let anyone get that personal info from you again. I just rooted last week and coverted to global firmware this weekend. I've had the phone since may 2020. I read these threads over and over each day and didn't make a move until I was sure I had things down. Take your time and read, read, read. Happy modding!
    1
    I'm waiting on my bootloader unlock code in order to do this on my T-mobile Oneplus 8. I've rooted phones in the past, but honestly it's been a few years. I have read a bunch of posts, but the info is pretty vague.
    Is this still the correct way to go to international? https://forum.xda-developers.com/oneplus-8/how-to/guide-convert-to-global-t4105885
    If I root, will I lose anything? (Google Pay, bank apps, etc...)
    Are there any lingering issues I should know about?
    The MSM Tool allows an easy way to go back to stock?
    Will it be safe to update to new firmware as they come out? Or is there a process for this?

    Sorry for sounding like a new newb, just can't seem to find all these answers easily. I think the last phone I rooted was an LG G4 when it came out lol.

    Yeah I was the same way so keys help you out here.
    That's a good link to follow.
    You may lost the ability to access banking apps if you root
    MSM Tool if awesome and gets you back to 10.5.7.IN55CB stock everything.
    I had no problems updating international 10.5.10 to 10.5.11. I'm TMO rooted running international version. Happy modding!