Rebel has developed an iPhone 4 case called the 2Phone that has the ability to add an additional line -- and SIM card -- to an iPhone 4. Rebel has been around for a while and offer quite a few unlock solutions for iPhone. What makes 2Phone more interesting is the fact that the two lines can be active together.
The Rebel 2Phone case has a SIM Card slot which accepts normal size SIM Cards. The case has its own battery to power the additional SIM Card and quad band cell radio; it can also power the iPhone 4 should, you run out of juice.
You need to have a jailbroken iPhone 4 to use the case as it requires some software to activate the additional line and calling ability. The case is available now, direct from Rebel but comes at quite a high price of £149.99 ($244). Shipping is currently free worldwide.
Take a look at the video after the break. Would you consider picking one of these up? Let us know in the comments!