
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.











[...] [via Techchee] [...]
Nice accessory for the iPhone 3G or 3GS surface. This accessory also provide the synchronization with your mac pc and easy switching between syncing and charging and with a hidden USB cable. This information is useful for I-phone users. Thanks for sharing.
Hey man this is just awesome I love this , it will come in handy with iPhones, Life will be easier with this feature on iPhones.
Also available that solution that seems to be more simplest to get 2 SIM in your mobile I use an older version of simore with my BB B9000 but consider getting an iphone and can only see for now and it look serious this platinum from this swiss company
Simore at http://www.simore.eu
The dual SIM holder platinum
http://www.simore.eu/en/Dual_SIM-168-Dual_SIM_Platinum.php
[...] users will always want more battery juice for intensive use of the iPhone. If none of the external battery packs has satisfied your need yet, you can have a try for the Monoprice battery pack, which costs $15 [...]
I phone dual card. Do both work automatically or does one need to switch from one to another.