The status returned will be one of the following:

Status	Description
`On`	The number exists and the handset is currently switched on.
`Off`	The number exists, but the handset is currently switched off or out of range.
`Dead`	The number does not exist.
`NotProvisioned`	The number exists, but is not owned by a mobile network, for example a landline number.
`BadNumber`	The number does not conform to a recognised pattern or contains non numeric characters.
`CountryMismatch`	The number is not in a format that matches the requested country code.
`ImpersonationFailed`	A username supplied to ValidateNumberForUserNames is not recognised.