So the definition and the formatting of the SIM free Mobile Phones is very simple and that is easy too. The advantages to the user are so many that there is no end to that as in the user does not have pay extra every month added to the per month rental that is the price of the phone. With the phone the deal can be of 35 pounds but that same deal in the list of sim only that is attached to sim free will be of 15 pounds that is the difference as in case of the sim free the full price of the phone is paid. so there are lot many little factors that seem to be contributing and making the sim free phones the phones of fame and the phones of freedom. 3 F can be the symbol fame freedom and free.