The history of the prepaid mobile phone or mobile phones pay and go begins in the 1990s, when larger markets were being sought after by the mobile phone operators. Before this date, all mobile phone services were offered on a post-paid basis, which excluded people with a poor credit rating. The first pre-paid card was called "Mimo" and was launched by TMN the Mobile Phone Operator of Portugal Telecom in September 1995. A prepaid mobile phone (also commonly referred to as pay as you go mobile phones, pay-as-you-talk, pay and go mobile phones, or prepaid wireless) is a mobile phone for...