An innovative accessory for the iPhone 3G or 3GS has surfaced. It comes in the package consists of a protective case and a dual SIM adapter, provides your iPhone 3G or 3GS the dual SIM capability as well as a 3-in-1 external battery to extend its juice.
If you’re a businessman who owns an iPhone 3G or 3GS and frequently needs to switch between two cellular networks, this accessory works best for your iPhone, allows it to have dual SIM cards.
The accessory also serves as portable power pack that ensures your iPhone never runs out of juice for coping with busy incoming and outgoing business phone calls. It also provides convenience for syncing with your PC/MAC with the battery on, easy switching between syncing and charging and with a hidden USB cable that lets you sync and charge your iPhone 3G/3GS anytime and anywhere.
Installation steps are also shown below, which you first need to insert the dual sim adapter, followed by the case. The best is the case protects your phone but does not add any bulkiness to it.