My wife and I both have the note 20 ultra through tmobile since they launched. We love the phones. On 2-26-21, we both got the OTA Feb 1st security update and things have been horrible since. It started with off and on messages wouldn't send. And weird messages about SMS sent via server. Then starting on Tuesday 3-1, we would lose service all together for hours while the other phone showed service. I've troubleshooted it so far with: 1) Turning on and off mobile data and airplane mode 2) tried turning on and off wifi calling 3) restarted phone 4) soft reboot 5) reset mobile network settings 6) factory reset phone (this worked best for about 20 hours but now is back to doing it again) Any ideas how to fix this? I'm positive it was the update that caused it as we both having the same issues on our phones after the updates. Update: tonight I went into network settings and turned off the 5g autoconnect and seem to be keeping service now. Question is, how do I get 5g back? If I turn 5g on, network operators just shows searching and it won't let me pick one myself. The security update we both got is Feb 1st, 2021 ...N986USQU1DUB5. Any way to downgrade to the Jan 1st one so our phones work again? Anything tmobile can do? Any ideas will be appreciated, thanks guys.
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