The Apple Peel is a like a holder case for the iPod Touch but the case connects to the iPod and enables phone calls the phone network of a compatible working SIM card that you install.
The Yosion Apple Peel 520 is a new wireless device that adds mobile voice and text messaging capabilities to the iPod Touch. The gadget acts as a protective skin that slips over the iPod Touch and includes a battery, dock connector and SIM card holder. Once the proper software is installed, the Apple Peel 520 adds the ability to make voice calls and send and receive text messages on your iPod Touch.
The Apple Peel 520 requires a Jailbroken iPod Touch 1st, 2nd or 3rd generation to make the SMS and Call app work. iOS Firmware 3.1.2/3.1.3/4.0/4.1 are currently supported. The iPod Touch 4th generation is NOT supported since it’s dimensions are different compared to the previous generations. Yosion is developing a special version of the Apple Peel 520 for the 4th generation iPod Touch. There is no ETA yet. You need a working SIM card. GSM (850/900/1800/1900 MHz) and EDGE networks are supported. UMTS/3G is NOT supported.