If I have $100 refill card and $40 prepaid plan, is it possible to use this refill card partly for monthly payments?
Yes it will pay for 2 months. The other $20 won't be used unless you purchase something using the funds like international calling. You could dump another $20 and would pay for another month.
Retrieving data ...
Manage your T-Mobile account
Use the T-Mobile App or your My T-Mobile account
We're here to help