It’s certainly not the most beautiful iPhone 4 case out there, and there are several pretty big negatives to it, but USBFever ‘s Duel SIM Card Cover seems to do the job well enough. The case allows iPhone 4 owners to use two SIM cards with their iDevice, without having to fiddle around with the SIM tray (potentially breaking it) and switching cards around. Instead, users clip both SIM cards into USBFever’s new case, and select the number they wish to use in Settings. According to the case’s site, after a couple of minutes your iPhone will find the desired network.