The users can even get free gifts with mobile phones under these plans. But under the SIM free mobile phones the users does not have to sign an agreement and can easily change to any other network at any time without any type of boundaries. Here the users have to buy new SIM cards with every new place they visit. The users just have to buy new Sim card every time they visit an new place and can change the network with the same handset. This deal is usually purchased by recent travelers who has to travel; to different places for some specific reason which mat vary from person to person. But under the pay as you go mobile phones, the users have the facility to change the network but with different handsets and not with the same.