I keep a T-Mobile USA Prepaid SIM for my occasional visits to the US. How often do I have to refill this account to keep the SIM and phone number alive, even if I'm not using it at all during several months? Once every month? .. 3 months? 6? year?
Best answer by tmo_mike_c
I have some thoughts on this. Based on the terms there, the 120 days wouldn't apply to you. Basically, on Pay As You Go, you'd need to keep a balance on the account to use service for 30 days. After that, the account will continue for another 30 days as long as there are funds available.
In my opinion, I wouldn't try banking on a grace period. This plan works best when you refill it as it was intended based on the terms of that specific plan. Letting the funds get low and dangling the SIM over suspension isn't the best way to keep the SIM alive.