gsm

Bulky Case Piggybacks A Dual-SIM Handset On Your iPhone

Bulky Case Piggybacks A Dual-SIM Handset On Your iPhone

As an alternative to carrying multiple phones while travelling, or swapping SIM cards to avoid roaming charges, you might want to consider this unorthodox solution: the iPPeel iPhone 4 case, which has a dual-SIM GSM handset on the back.