WHAT IS IT? This device provides battery back-up and dual-SIM functionality for the iPhone 3G and 3GS. While it doesn’t allow the device to monitor both SIMs simultaneously, it will save you the hassle of having to remove and replace the cards. You’ll add a bit of bulk to your iPhone, but for some, the convenience may be worth it.
WHO FOR? The consumer who’s trying to take advantage of the best mobile deals from more than one provider. And those who could do with some back-up battery juice for their iPhone.
WHO SELLS IT? www.usbfever.com
THE PITCH Bulk up your iPhone.