One Plus 6t lost Mobile Connection when upgrading to Oxygen OS 11.1.1.1
VandyTripleD13

My wife updated her One Plus 6t and lost connection to the Verizon network (my own non-updated 6t did not have any issues).  Factory Reset, Verizon Support, OnePlus support did not have a way to fix the problem.
When testing out swapping SIM Cards with Verizon Support, I tried moving the SIM card to slot 2.  Everything magically worked after that.  Hopefully this helps someone else out.

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vzw_customer_support
Customer Service Rep

That is very helpful Vandy, thank you for the feedback and for sharing your solution.  

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