Returns a true or false result to indicate whether the string value passed in is a valid phone number. This function uses the same phone number validation as the SMS components of the application.


1stringRequired. The phone number to evaluate for validity.

If the phone number 555-555-5555 is valid, then the function listed next returns a true value. Otherwise, false is returned. For example, a true value is returned for the phone number 555-555-5555.

This function, IsPhoneNumber(), falsely returns true for some phone numbers with a 922 and 926 prefix. When a false number is processed as true, it causes the entire batch to fail for a call.