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.
Customers on one of Verizon Wireless' monthly plans receive unlimited night and weekend minutes regardless of how many anytime minutes are left on the account. This is rare among prepaid phone companies and is especially valuable to those customers whose monthly plan isn't unlimited.