I bought a Pixel 6 Pro several months ago. Eventually, the screen developed a green tint unless the brightness was at the maximum. Shortly after that, the screen became so dim that it was virtually unusable except at night.
I flashed stock Android on the phone so I could sign in with my Google account. I did forget to delete the AVB key though. I had contacted Google support before about it and they wouldn't help me because the IMEI I gave them wasn't tied to the Google account I was signed into.
After signing into my Google account on the phone with stock Android, I contacted Google support again and they told me that I could either mail it to them or take it to UBreakiFix, since it's still under warranty. I opted to take it to UBreakiFix. I set up an appointment with them and dropped it off. They asked me if it had been factory reset. I said yes because I factory reset it before installing stock Android, but I hadn't factory reset it since signing into my Google account.
They called me back an hour after I left and the person on the phone said something about the calibration being off and that I would need to come back to their location. (I don't remember this conversation very well. Maybe he was referring to calibrating the fingerprint reader.) When I got there, the person at the front (a different person than the one who called me) said that it hadn't been factory reset. The person who had called me and was working on my phone brought it out to me with a new screen on it. The display worked, but it did not react to touch. He said he would work on it some more and try to get it working.
I mentioned that it used to have GrapheneOS installed on it. (This was a mistake). He said that might be the cause of the issue, but he said he would still try to get it working.
The next day, he called me and said that installing a different operating system voided the warranty and that I would have to pay for the repair. I sort of joked that I shouldn't have told him and he said that they wouldn't have known unless I told him. I told him that I would not be paying them for the repair and to put the old screen back on.
When I went back to pick up the phone the day after that, a different person at UBreakiFix said that I could contact Google support and see if they are willing to make an exception for me. The person who was working on my phone also mentioned that when they are repairing the phone, it connects to Google's systems and they were able to tell that something was off. This somewhat contradicts his earlier statement that they wouldn't have known about GrapheneOS being installed on it unless I told him.
At this point, I could:
Mail the phone to Google for repair, hoping that UBreakiFix didn't tell them about GrapheneOS being installed on it.
Ask Google support to make an exception for me. I don't know how likely that is.
Repair the phone myself. I could buy the screen from iFixit for $200, and replace it myself. I don't know if the touch function would work, however.
Take it to another UBreakiFix location. I doubt this would work, since they log the IMEI of the phone.
Do I need to reinstall GrapheneOS in order to remove the AVB key?
Does anyone have experience with this? What do you think I should do?
Thank you in advance.