With the introduction of the iPad WiFi+3G and now the iPhone 4, one thing as a gadget guy that has become more challenging is moving my SIM cards around between devices. As I test various devices whether they be 3G MiFi devices, 3G USB data cards, iPhones or Androids, I want to be able to simply use the same wireless accounts and go back and forth as I please. After all that is the advantage of GSM devices over CDMA. However, the iPad and iPhone kinda screw that up because they use MicroSIMs and all my other devices use full size SIM cards. The good news is that technically there is no difference between the SIM and the MicroSIM other than the physical plastic around it. The pin layout and contacts are the same.
Cut My SIM to the rescue
Since a MicroSIM is nothing more than a regular SIM card with the excess plastic cut away, I ordered a Cut My SIM MicroSIM cutter. The device resembles a hole punch and you just insert full size SIM in, press down and out pops a microSIM from the bottom. They even provide two SIM converters to use in case you ever wanted to put your MicroSIM back into a device that uses full size SIM cards. Since I didn't want to risk screwing up a working SIM card, I first tried it on that had been deactivated. I cut it, popped it back in the converter and put it back in the phone and although it wasn't an active number, the phone did recognize it as a SIM card again. Next I tried it with the SIM card from my iPhone 3GS and put the newly cut down MicroSIM in my iPhone 4. No problem! It works! Later this summer when I test the Android phones (and maybe the tablets) it will be great just using the same SIM/MicroSIM card to go back and forth between the two devices.
You can get Cut My SIM here from their site. ($25) Due to the heavy demand, there will likely be a delay before yours ships.
If you're starting out with a MicroSIM and just want to go to a regular SIM size using the converter trays, you can get those here.