Sim card issues on anything other than Android 11

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Senior Member
Jul 15, 2010
OnePlus 8T
I've been running the official release of Android 11 on my Pixel 3 XL without issue other than I'd like the battery life to be a little better. Had a really weird issue that maybe someone might have some insight about. My sim card only works on Android 11. If I run the official Android 10 from August, no sim detected unless i take it out and put it back in. I select the apn and I don't connect. Upon reboot the sim is not found until I take it out and put it back in. I tried Havoc GSI (10) and PixelDust (10) custom roms and don't connect with them either. Used the Android flash tool back to 11 and sim works without issue.

Figured it out. If I unlock the bootloader, the sim doesn't work. Never seen this before on a phone.
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