String literal. A string literal or anonymous string is a type of literal in programming for the representation of a string value within the source code of a computer program.
As usual, the devil is in the details. For instance, with some prepaid wireless plans, your minutes are only good for a limited time, usually 30 to 90 days. If you don't use them before they expire, they are simply subtracted from your account anyway.
The remaining minutes on a T-Mobile plan can be checked by keying #MIN#, or #646#, on the phone, and pressing the call button. If a user owns a prepaid account, the remaining minutes can be checked...