subject: Mobile Phones: Bringing the World together [print this page] The contract deals entitle you to a signed contract, during the term of which you have to pay a fixed amount to the service provider, monthly. In Pay as you go phones, the charges have to be paid only according to the services used by you. The SIM free mobile phones are unlocked and hence you can use the SIM of any network on your phone, at any part of the world. If you want a change in network, you just have to buy a new SIM with the SIM only deals. These SIM can be again used under contract or Pay as you go deals.
