T-Mobile Pixel 10 Pro XL (GUL82) - OEM unlock issue

trifle

I've been attempting to install GrapheneOS on a Pixel 10 Pro XL purchased from T-Mobile (SKU: GUL82) and have hit a wall with the OEM unlocking toggle being permanently greyed out. Posting with full diagnostics in case this helps others or someone has a path forward.

Device info:
Model: Pixel 10 Pro XL
SKU: GUL82 (T-Mobile variant)
Carrier: T-Mobile
Status: Carrier unlocked per TLife app and T-Mobile portal

What I've tried:
Confirmed carrier unlocked in T-Mobile's systems (TLife App, and customer support)
T-Mobile Device Unlock app: temporary unlock succeeds, permanent unlock fails with reason codes 08 and 09
Factory reset with T-Mobile SIM inserted before first boot, Google account signed in during setup wizard, on cellular with no filtering throughout
Completed setup fully before checking OEM toggle or connecting ADB

Logcat pattern on clean factory reset with no modifications:

I OemLock: Update OEM Unlock bit in pst partition to false
W ProcStatsManager: No process com.google.omadm.trigger/10172 for service com.google.omadm.trigger.SendNIService

OemLock writes false every few minutes. SendNIService is scheduled via JobScheduler but the process never spawns. This is on a completely stock unmodified device.
fastboot output:

fastboot flashing unlock → FAILED (remote: 'flashing unlock is not allowed')
fastboot flashing get_unlock_ability → 0
ro.boot.vbmeta.device_state → locked
ro.boot.flash.locked → 1

Looking for confirmation on whether GUL82 is a permanently blocked SKU or if there is any known path forward. Thanks a lot. I was super excited to install Graphene on something newer after running it on a 6a forever.

Developer-Dude

trifle are you connected to WiFi? You must be connected to WiFi to be able to OEM Unlock it

DeletedUser892

trifle If you bought it from a carrier, that's it. No dice. Sorry.

Johnnyloans

trifle

This app is for doing carrier unlocking. Since permanenent unlock fails, then your phone is still carrier locked.

What's a Device Unlock
Device Unlock lets you use your device with another carrier, for things like international travel or selling your device.

https://www.t-mobile.com/support/devices/unlock-your-mobile-wireless-device

Is your pixel phone fully paid for? Maybe there's a 6month, 1years, or 2years wait period.

I would contact T-Mobile helpdesk and find out about carrier unlock and OEM unlocking (bootloader unlock). The people might not know of any unlocking or think only 1 type of lock exists. Might want to try to reach level 2 or 3 support.

DeletedUser892

There's a small chance.

trifle

Thanks — tried both cellular and Wi-Fi on a completely clean factory reset with no modifications. Same result either way. The SendNIService failure is consistent regardless of network connection type.

DeletedUser892

Johnnyloans I hope you're right! Experience tells me you're probably wrong, sadly.

trifle

Johnnyloans

I'm not confident T-Mobile can help. The status page from the T-Life app says, "Google Pixel 10 Pro XL is unlocked
This device can be used with compatible networks, domestic and abroad."

I've talked to them a couple times and they say they have nothing to do with OEM unlocking. According to them my phone is unlocked. They don't do anything with OEM unlocking. I may try again and shoot for Tier 2 or 3. Maybe I'll get a different answer.

trifle

What strange is T-Mobile support and the T-Life app claim the phone is "fully unlocked." However, when I use the TMobile device unlock app, I get a message indicating the phone is capable of temporary unlock, but not permanent unlock with reason codes 08, 09.

Also, SendNIService fails to spawn even on a completely clean factory reset with no prior modifications.

de0u

trifle I'm not confident T-Mobile can help.

Unfortunately, if it's a T-Mobile device and it's running the stock OS and T-Mobile's app can't unlock it, the situation is between them and Google.