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.
*Prepaid card mailed to Comcast account holder within 18 weeks of activation of all required services and expires in 90 days. Prepaid cards issued by Citibank, N.A., pursuant to a license from Visa U.S.A. Inc. and managed by Citi Prepaid Services.