Having a phone that can easily switch between SIM cards is very convenient, especially if you travel a lot. Usually, you’d have to manually take out a SIM card and insert another one in its place, unless you’ve got one of those off-market phones with mulitple SIM slots. The thumbsUp! case makes this process easier, if you happen to have an iPhone.
No official iPhone has had a dual-SIM card functionality, which is probably one of the reasons why thumbsUP! released its Dual SIM Card case. The case allows you to carry two SIM cards at the same time. You can switch cards simply by powering down your phone and flipping a switch on the back of the case. It supports micro as well as normal-sized SIM cards. It appears to connect into the iPhone’s SIM slot on the side and then provides its own switching mechanism.
The Dual SIM Card case sells for £29.99 (~$48 USD) and works for the iPhone 4/4S. If you’re planning on upgrading to the new iPhone that will be announced this week, you might want to wait until a compatible case is released.