The only bad thing for my situation is that a few years back T-Mobile had terrible signal strength around my house. I might try buying a pre-paid SIM from them and seeing if things have improved.
TMo has definately had a rocky history with signal strength, at least compared to
verizon in most places... But it seems like they keep adding new signal and
new "low frequency" support that's supposed to help things...
https://www.tmonews.com/tag/low-band-lte/
So far, things have been going better with my Cosmo then reception was with
my Gem.
Good luck,
PJS
Spent a couple hours wasting time with AT&T support on Friday. Got the "we'll call you back" (which they didn't) brush off so I went to the AT&T store for help. The guys there were sympathetic and did what they could but they had no luck restoring my service even after telling their system the Cosmo was a Samsung Note 10.
So, on Saturday I went to T-Mobile and got a prepaid plan just to test out the signal strength around my house which, the last time I tested it a few years ago was near zero. The guy at the store put in a SIM and their system recognized my phone with no problems. He mentioned that if signal was still an issue around my property that they would provide a free signal booster. I took the phone home to test the signal and fortuitously, signal strength in my house was quite good (actually about one bar better than AT&T). I went back to the T-Mobile store today and ported over my number. I don't think I was there for more than five minutes. In all, probably not more than twenty minutes with both visits combined. They couldn't have made it easier.
I never had trouble with AT&T's service until this phone issue. It's too bad they weren't really interested in or able to connect me to the people in the company that could provide a resolution.