Utilitarian Dual SIM iPhone 4 Case
This quirky-looking iPhone 4 case by USB Fever
has one unique feature most other cases lack: a dual SIM card slot. For $30 you get a case, room for an additional SIM card, and a dual-SIM adapter. Once you have your piggy-backed SIM card attached, you can toggle between the two cards using the iPhone’s settings menu. Unfortunately you can’t use both SIM cards simultaneously, and when you switch from one SIM card to the other, it takes a few minutes for your iPhone to search for a signal. During this time you may get a “No SIM Card Installed” warning, but this will disappear after a minute or two. Not a deal-breaker compared to needing two phones on a long trip.
This case isn’t the most attractive case out there (by far), but what it lacks in looks it makes up for in utility. The hassle of using more than one phone while traveling makes this case one to consider if you think you’ll be traveling internationally. Another bonus: no iPhone death grip problems, but all cases can of course make that claim.