Provide API to expose SMS Protocol Identifier (aka TP-PID)
Some protocols, such as Visual Voicemail, rely on the "SMS Protocol Identifier" (aka TP-PID) in order to tell a VVM SMS versus a regular SMS:
https://www.gsma.com/newsroom/wp-content/uploads/2012/07/OMTP_VVM_Specification_1_3.pdf
See Section 2.9 VVM SMS INTERFACE DESCRIPTION
It would be nice to have an API for the SMS to expose that for programs to use.