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S9 help needed

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So, this is a friend's phone...
I know, whenever I hear someone say that I think to myself "sure buddy". But seriously, it's true, this is not my phone but I have taken on the task of repairing it. My personal phone is actually a Pixel 2 XL, which I chose so I would never have to deal with a phone that had a locked bootloader or a strict root policy; forcing me to scour through forums for solutions to problems that are created by the cell phone manufacturers and carriers.

Moving along, my friend's phone is a Tmobile Galaxy S9 (g960usqs6csgb) (SM-G960U)
I believe it has the Snapdragon CPU (qualcomm and qual was littered all over the bootloader logs) but I don't know what Android version it's on. Because I can't get past the initial setup screens... because, you guessed it, the device was factory reset and now it's locked because he doesn't have the previous owner's google account credentials and it won't allow further progress. A message is displayed at the wifi setup screen stating as much, and at this point the unit is entirely useless.

When I first saw him with the phone in hand, wrestling to get it to work, I proclaimed "I can fix it!! Not to worry!! After all, I used to root and ROM and ADB with the best of 'em !! Going back to the early days of android, cracking open the incredible, galaxy nexus, HTC 9, nexus 5, note 5, etc etc. My Pixel 2 XL was the first phone I didn't root, simply because it already had all the features I wanted, right out of the box! But this phone wasn't cooperating like the old devices. Apparently the carriers and manufacturers have incorporated new ways to deter nefarious activities and squeeze out every bit of money from us hapless technology addicts.

I digress. Is there any way to get past this? I've already downloaded Odin 3 and I believe I'm hot on the trail of this model's firmware:
https://www.sammobile.com/samsung/galaxy-s9/firmware/SM-G960U/TMB/download/G960USQS6CSGB/283293/

But is this even possible? Will rooting and flashing a new ROM remove the unauthorized factory reset lockdown? Will the device even let me get that far? I don't know anything about rooting the S9 but it's all here in the forums, I just wanted to know if there's anything I should be aware of in advance. I'm not too concerned with bootlooping/bricking or losing google pay or something similar because it's basically a paperweight already. But if there's a way to do this properly, I certainly don't want to mess it up irreparably by charging headlong into the fire when I might patiently tiptoe and emerge unscathed instead. I appreciate any help you might offer.

Thanks!!
 
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Yikes, not a single reply.

No one's gonna touch this one, a?

At least I got a like. Thank you to the brave individual willing to sit back and watch the trainwreck go its course.


TLDR: Can I get past the Google lockout on a TMobile s9? Is it possible to unlock, root, and flash a ROM on an otherwise locked s9?
 
If your stuck on FRP lock then maybe this thread may help.

Thank you very much. Didn't even know what to call it so search wasn't very helpful.
 

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    So, this is a friend's phone...
    I know, whenever I hear someone say that I think to myself "sure buddy". But seriously, it's true, this is not my phone but I have taken on the task of repairing it. My personal phone is actually a Pixel 2 XL, which I chose so I would never have to deal with a phone that had a locked bootloader or a strict root policy; forcing me to scour through forums for solutions to problems that are created by the cell phone manufacturers and carriers.

    Moving along, my friend's phone is a Tmobile Galaxy S9 (g960usqs6csgb) (SM-G960U)
    I believe it has the Snapdragon CPU (qualcomm and qual was littered all over the bootloader logs) but I don't know what Android version it's on. Because I can't get past the initial setup screens... because, you guessed it, the device was factory reset and now it's locked because he doesn't have the previous owner's google account credentials and it won't allow further progress. A message is displayed at the wifi setup screen stating as much, and at this point the unit is entirely useless.

    When I first saw him with the phone in hand, wrestling to get it to work, I proclaimed "I can fix it!! Not to worry!! After all, I used to root and ROM and ADB with the best of 'em !! Going back to the early days of android, cracking open the incredible, galaxy nexus, HTC 9, nexus 5, note 5, etc etc. My Pixel 2 XL was the first phone I didn't root, simply because it already had all the features I wanted, right out of the box! But this phone wasn't cooperating like the old devices. Apparently the carriers and manufacturers have incorporated new ways to deter nefarious activities and squeeze out every bit of money from us hapless technology addicts.

    I digress. Is there any way to get past this? I've already downloaded Odin 3 and I believe I'm hot on the trail of this model's firmware:
    https://www.sammobile.com/samsung/galaxy-s9/firmware/SM-G960U/TMB/download/G960USQS6CSGB/283293/

    But is this even possible? Will rooting and flashing a new ROM remove the unauthorized factory reset lockdown? Will the device even let me get that far? I don't know anything about rooting the S9 but it's all here in the forums, I just wanted to know if there's anything I should be aware of in advance. I'm not too concerned with bootlooping/bricking or losing google pay or something similar because it's basically a paperweight already. But if there's a way to do this properly, I certainly don't want to mess it up irreparably by charging headlong into the fire when I might patiently tiptoe and emerge unscathed instead. I appreciate any help you might offer.

    Thanks!!
    1
    If your stuck on FRP lock then maybe this thread may help.