OK so you have your iPhone 4 or iPhone 4S but you still carry around another phone for work, personal use or what ever you need it for.
How about combining the two?
This is a case for the iPhone 4 or 4S that is a phone on it self so now you carry one thing that is two phones.
And the phone case even lets you use two sim cards so that you are almost carrying 3 phones.
It supports GMS bands 900 and 1800 so that you can use it for travels to.
The case has a 1800 mAh battery that can be use for the phone in the case but can also be used to charge your iPhone.
It maybe a bit strange but it is fun. Come and check some other picture and information about this iPhone 4S Case With Phone.