If you have an unlocked Tmobil with the Digcel sim inserted you can send *124# and it will give the date your credit expires out as well as the "drop dead" date of your sim card. If you go past that you'll have to get a new sim and a new phone number.
For instance, my credit will expire in mid March but my sim will not expire 'tll July.
I have a few hundred Ja. left in credit because just before I left in December I sent most of my credit to my kids.
Next week I'll put a couple of thousand on the phone for use on our trip in March.
I travel home every three months.
