Type of number indicates if the number is a complete International Number (which requires the + prefix), a Country Code Number, or an alphanumeric sender (which contains up to 11 characters of alphanumeric sender id, which is handy for branding/advertising).

The NPI indicates which numbering standard is being used for the supplied mobile number. It might be the operator’s numbering (for premium services, for example) or the E164 international mobile numbering standard.