So you have the shiny iPhone 4 and its unlocked, but you have more than one sim, what to do? But a dual sim adapter of course.

The “iPhone 4 Dual sim adapter” does exactly what it says on the tin. The gadget has a transparent plastic shell that has room for two sims. You can even swap them around without having to reboot the iPhone 4.

OK so the switchover takes a minute or two to go from one sim to the other but the unit makes swapping out sims much more easier.

Switching the sim involves picking the one you want from the Applications Seting menu on your iPhone. To do this you will need to run either iOS 4, 4.0.1 or 4.0.2. There two into one does go!

Link: USBFever