Sim free phones are not locked by any network provider
. Hence if you want to change the Sim card, you can do it immediately. These phones are offered by all the big mobile brands including Nokia, LG, Samsung, Blackberry etc at pocket friendly rates. Sim free phones are very flexible and allows you to switch to another network if you are not satisfied with the previous one. If you are passionate to the mobile phones frequently, then Sim free phones would be the best choice for you.You can choose Sim free phones through online portals, where you can check the prices to have it at the cheapest rates. So just check it online to get the cheapest deals for your dream phone with a network of your choice.