Finally solved this issue after trying everything! The only thing that worked was activating a physical sim to override the eSim
This starting occurring two days ago on my wife’s iPhone 13 Pro. Same experience with T-Mobile punting the issue to Apple meanwhile it’s clearly T-Mobile related. We are not alone, this is effecting many iPhone 13 users on T-Mobile. No clear resolution yet. Switching your eSim to IMEI2 temporarily resolved the issue but the error came back within 10 hours and remains unresolved (again) for 18 hours at this point.
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