Isquare,

On my desktop T-Mobile Account Manager I get a separate display for International Data under: Usage, Data, then scroll to the bottom of the list. There should be a category simply labeled "International Data" below "Messages" and "Calls". I don't think it appears unless you actually have some international data used. This appears per line if you have more than one on your account. Canada & Mexico do not register separately from my recollection. This had me wondering, but after roaming in Mexico, then several other countries, the High Speed data I was getting was in excess of the 5 Gb allocation. This was also confirmed by other users on Reddit. My plan going forward includes having 5 Gb HS data in Mexico, then another 5 Gb HS data globally per line, per billing period.

Your on line account displays the days remaining in the billing period under: Usage, Current Cycle. My billing has it's last day on the 4th of every month. This is a copy/paste:

Current cycle

Jun 05 - Jul 04, 2023 (30 days left)