The mobile phone market has swollen up drastically in a decade and having a cell phone gradually became a necessity. To exploit the growing handset market, the service providers collaborated with the device makers to hold a substantial leverage over the demand of a particular handset. This has created a deafening exploitation of the customers under a particular network. However, before it could have generated a chaos the service providers have came up with SIM Only plans. Under the SIM Only plan a user can go to any service provider and avail the services – which ever look beneficial to him/her – of a particular mobile service provider of their choice. The SIM Only has generated a lot of popularity in the market and suddenly service providers are bending unexpectedly to buckle the customer to their services. The competition among the careers has stiffened and every carrier is using all possible tactics to woo the consumers with lucrative offers. Now with the change in the scenario service carriers like Orange, O2, Vodafone or T Mobile any could be you service provider which ever holds your interest. This is because most of the major carriers are coming up with the SIM Only offers; you can switch to any of them whoever is offering you the best offer.