Technical Support Forum For iPhone Users
If you have an old iPhone whose contract has expired or because you bought a newer version, you can continue to use it as an iPod touch. The support article on Apple includes instructions for converting your iPhone that can be used as an iPod touch with Wi-fi support. After you use a newer model for your iPhone or cancel your wireless service tariff / account for your iPhone, it is still possible for you to continue using your old iPhone without active cellular service. You can do this by using it with your Wi-Fi.
For older iPhone versions like 1G / 2G, all you need to have is an original SIM card for technical support. This is important without which there will be no point. However, iPhone 3G and iPhone 3GS can use any SIM card to activate the phone that will be used for your iPod Touch. So, … Read More