TVWBB 1-Star Olympian
If you're still using one of those old Sprint phones they're getting very spotty at best. TM is rapidly turning off all the old Sprint CDMA signals. Going instead with GSM/LTE/5GSprint was bought out by TM.
Our service was Sprint, through Boost Mobile.
I have to assume that currently your service, and ours, is mostly going through TM's towers.