I'm using an unlocked pixel 6 pro on Verizon and have had ridiculous sim issues. The first time my card became unreadable was after a restart. Sim worked fine in other phones, but the 6 pro didn't even know the card was there. New sim, resetting network settings, changing connectivity settings, into and out-of airplane mode, nothing worked for me. Hours of time wasted with support to no avail. Factory reset finally fixed the problem...temporarily. Support suggested I go to ubreak-ifix. Ubreak-ifix told me not to bother as 1) they didn't have parts yet, and 2) Google would most-likely deny a fix if a factory reset solved the problem--even temporarily. I obtained an RMA and sent the phone in for service. A week later it was returned to me stating no issues were found. I did a little "unboxing video" of my newly returned device still not recognizing my sim, and I sent it to customer service. At this point it was about four weeks of back and forth while the device was still a brick. I asked for a refund and was told I was outside the window. True, but ONLY because Google's massively time-eating "support" dragged it out that long. I was well within the return window when the problem started, and it still hasn't been fixed. I've been with AMEX for thirty years and opened my first-ever dispute with them when it was long-past apparent that Google could not or would not fix the problem. I was really excited about this phone, but now I'm done.