Features: Compatible with all iPhone 4 4S(even blocked / SIM-Lock) Two SIM cards in your iPhone 4 4S Simultaneous connection Both SIM cards are active at the same time Power extender for your iPhone 4 4S battery Both SIM cards signal strenght appear on your iPhone 4 4Stouch screen Both battery level status are shown on your iPhone 4 4Stouch screen Compatible with any providers SIM or USIM cards Does not require to cut your SIM cards Avoid roaming charge Scratchproof and shockproof Unlocking your iPhone 4 4Sis not necessary Function Enable / Disable & Change PIN code Specifications: Integrated Battery: 3.7V/800mAh GSM Quad Band:800/850/1800/1900Hz Input/Output: 5.0V/500MA Talk Time: 500min. Package included: 1x 2 Phone 1x Battery 1x USB cable Note: Only use the supplied USB cable to recharge the 2Phone battery Requires to jailbreak your iPhone 4 4S Requires installation of the 2Phone software in your iPhone 4 4S(after jailbreak) With some network providers, vibrating mode can replace…