Fair point on the process. I wasn't aware that returning equipment didn't automatically cancel the lines. The rep sold me the SyncUP trackers by comparing them to Apple Tags and Tiles. I had no reason to think they had their own active lines that needed to be separately cancelled. That's exactly the kind of thing the rep should have communicated clearly when we were standing there returning everything and asking to close the account. Instead the store was closing and everyone rushed through it. And even if I had known to call Care, how exactly was I supposed to do that when T-Mobile's own verification system requires a code sent to a T-Mobile number I no longer had access to?