SIM unlock failed:device must be activated on t-mobile - OnePlus 8 Questions & Answers

delete me

You'll have to somehow unlock the device.

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[Q] unlocking my phone

is there a way to unlock my phone just using my tmobile sim because i already got my unlock code for my phone but not another sim for it...is there any alternate options?
any one please?

Sim Unlock

Is there a way to get a Sim unlocked on this phone?

It's a sim unlocking question

Hi, I have an S6 that is sim locked. I also have a sim unlock code that works, but I have to enter it every time I restart the phone. Is there a way to permanently unlock the phone using that code?
thx in advance

How to unlock Boost LG Stylo 2? (I have the unlock codes)

I have the unlock codes.
How do I get the phone to request an unlock code/get to the unlock menu?
I am not in america so uicc unlock is not an option?
Can I possibly flash another rom to help the process?
Thanks
Stylo2
I would appreciate the help with my boost stylo2.
I can't speak for your particular carrier, but with T-Mobile, you put a SIM card in from another carrier and it immediately, upon boot completion, asks for an unlock code. Put in the unlock code and viola(!), you're golden!
Hope it helps for your situation.

Unlocked TMobile/Sprint 8t, have a simple root question

I'm not asking how, I already know that part. I have an unlocked TMobile/Sprint phone, but from reading TMobile roms are a bit different as they do thier own or modified oos.
I have checked and I can toggle the oem locking in settings. I own the phone outright but I don't have an unlocked sim. I've heard with TMobile you have to call and have the sim unlocked , which in turn let's you then toggle the oem unlock so you can unlock the bootloader.
So my question is, since I bought the phone unlocked, and I can toggle the oem unlock feature, can I just unlock the bootloader now and proceed with root or does it sim need to be unlocked too??
You have to go into fastboot to check if you have it toggled on in dev options go into bootloader and do fastboot oem unlock from command prompt it will unlock or it won't you may have to get an unlock token from one plus also TMobile locks bootloader you need an unlock token file

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