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.
When you use up your minutes, your cell phone will stop working until you buy more. Most providers allow you to buy your minutes right over the phone or on the carrier's website. A few prepaid wireless providers let you attach your credit card or debit card for auto payments (if you choose).repaid minutes can also cost more than minutes on a traditional cell phone-but many consumers view it as a small price to pay when the alternative is high deposits, huge monthly bills or worse yet, no cell phone at all.