New Product - 2Phone that has the ability to add an additional line — and SIM card — to an iPhone 4.
COMPATIBLE WITH GSM BAND 900/1800 ONLY
The 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.
That 's not all, the 2Phone case also contains a rechargeable battery that powers the dual SIM operation. Not only does it not drain your iPhone battery when making calls on the 2nd SIM card, it will actually recharge your iPhone if your battery gets low.
It is important to note that the case will only work with jailbroken devices.
2Phone Design and Features:
2Phone is compatible with iPhone 4 perfectly, it can make your iPhone 4 Dual SIM Dual Standy or Dual Mode Dual Standby.
Two SIM cards online, no need to switch network, then you can enjoy calling, phone answering and message sending.
Dual SIM Dual Standy: GSM,3G(WCDMA)
This is a mobile without screen and keyboard.The perfect combination with iPhone 4 makes it to be dual SIM dual standby mobile.
The battery is widely available and it is a Samsung E398 model battery.
ultra thin desighing making you enjoying your iPhone 4
Compatible with: English ,German, Simplified Chinese,Traditional Chinese
First Step: Jailbreak
Second Step, To install 2phone software via wireless network (3G network or WIFI)
*Click cydia icon > Manage > Sources > Edit > Add > input www.2phone.com/cydia > Add sources
*Return to cydia > Select 2phone > Select www.2phone.com > Select 2phone > Install > Confirm