Migration from Sprint to T-Mobile

I just upgraded the SIM card in one phone to the TMobile side. I've been with Sprint since the first day they opened a store. So far, I kinda like it since my sketchy 5g in my home went to almost full bars of 5g vs toggling 4g full bars to one bar of 5g.

I was told yesterday that the migration of accounts would come through them and no walking into a store would be needed. I have the other SIM cards that were mailed to me, I just haven't replaced all of them yet.

So far, so good.