doctorSIM provides users with mobile phone plan recommendations. The service searches hundreds of thousands of combination's to calculate total savings. Currently serving Spain and LatinAmerica and its 250 million mobile subscriber population, doctorSIM has identified potential savings in excess of 300,000,000 EUR, thanks to its mobile optimization savings algorithm. Tightly coupled is the Cell Phone Unlock service, empowering worldwide users to maximize phone usage. Additionally providing Telecom Expense Management (TEM) for companies with over 5,000 phone lines, as well as mobile retention and price simulation software for Mobile Virtual Operator Networks (MVNOs) and retail distributors.