Missing calls and texts in or out from my T-Mobile usage and phone records reports...

Amato wrote:

Thanks so much, but zero roaming,  Samsung A15 and my lines are here in Tennessee, and never usage reporting?

Not sure why...

Domestic roaming you'd never know.  For example the tower near my workplace belongs to a local cellular company that owns the rights to certain bands.  T-Mobile, Verizon, and AT&T roam on that tower because they don't own that spectrum and need the coverage.  International roaming it will often give you a message or a symbol if you are internationally roaming.

For usage on that tower I often don't see usage from that are until days later and at times sometimes a month later.  It's all depending when the owner wants to get paid it seems like.