If you’re a high flying swing type two contracts and, finally, two SIM cards, the new 3-in-1 external battery over USBFever could save a lot of hot-swap – assuming that at least one of the SIM cards is currently on an iPhone 3G or 3GS. It appears that an ordinary battery, bulky, but within the packet space for a second SIM. Trade is handled through an application on the phone and, according to the instructions online, which will take about two minutes for your phone to find out exactly what the hell is going on and reconnect to different network. Unfortunately the phone can not handle the two cards at once, so if you frequently receive calls from both you are stuck with the second device, but if the day you’re a corporate user mild manners and night to change your secret personal account This could be for you. $ 60 takes you to exchange the card game – just leave the keys in the plate on the way in.

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