3 SyncUP Trackers connected by T-Mobile, like an Airtag

I have three sync up trackers, one box has never been opened, 2 have but never used. this allows for location tracking, virtual boundaries and motion alerts. each box includes the tracker, USB charging cable, lanyard and start guide. they sell these except ones at T-Mobile. I believe you have to have T-Mobile to use these, $5 a month.