T-Mobile PAYG Sim Cards Accepting Calls with Zero balance
I got a t-mobile PAYG sim and it allows me to accept calls even with zero balance. Obviously, I cannot call out but it is very useful for me to use this number for entering my details to avoid spam. Just wondering if anyone know how long does it last before they cancel my number without putting any money in the card? Also, does all PAYG cards from different companies also allow calls to be accepted with a zero balance??