iOS 12.1 Connectivity Issues (iPhone 7)


    I just recently updated to iOS 12.1 (previously running the latest 11.x) and am having connectivity issues.  I typically go through a spot which switches my carrier to ATT for a bit and then back to T-Mobile.  This now only works occasionally and usually just says no service.  Also, sometimes when going from this no service to T-Mobile, it gets stuck on E instead of LTE for a long time (even with full bars).  I have had it also just stay on no service until I reboot the phone. 

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