SMS billing flow
What is SMS billing flow?
SMS billing flow is a process of verifying the customer. They have to either send or receive an SMS in order to be able to make a payment. Multiple types of SMS billing flow exist.
MO SMS: User sends a keyword from their phone
MT SMS: User gets an SMS to their phone
Handshake MT: User get an SMS that they must reply to
MSISDN: User’s mobile phone number