AT&T: does SIM card need to be provisioned for 5g?

I thought if it's working, it's provisioned, as shown by the ability to access your account through your carrier?
Is there a benefit to an occasional re-provisioning?
 
I moved a android phone sim to an apple air 2 the other day, and didn't expect it to work. It does, but it's confused as to what to do with the assigned phone number, so I use Google voice. FaceTime works, with the email address that the tablet was set up with showing as the caller: while under device info it will show the phone #.
A tmobile tablet data plan is 2x the price of the phone plan, so I'm going let it ride till it no longer works.
When it does stop, I'll do a provisioning.
Thanks for the reply.