Now you can have the convenience of two sim cards in your iPhone 3G or 3Gs without the pain of opening the sim tray every now and then. This battery pack from USBfever not only adds extra 1900mAh power to the iPhone, but also gives your the pleasure of two sim cards without any requirement to cut them. This also allows you to sync and charge your iPhone+battery pack without opening setup. The pack also has LED indicators.
Though you cannot use both sim’s at once, you can switch easily between the two. While I really don’t prefer to bloat the figure of my iPhone, this would cost $59.99 if you really like to switch between two sims along with some extra battery charge.