Advanced mobile financial services with an advanced technology partner. A The Airvantage Prepaid Airtime Advance System (“PAAS”) offers Mobile Network Operators airtime, data and mobile money services: the ability to advance airtime, data or mobile money to subscribers. Our experience in emerging markets has allowed us to create cutting-edge technology that avoids revenue losses and ensures ongoing customer loyalty. 1 to 2 Paragraphs (minimum 100 words in one paragraph.