Have you ever expected an external device which converts your iPhone 4 into 3 SIM cards Tri Standby? Have you ever been in trouble that when you travel or live for a short time outside of your local service provider, you have to change SIM card in order to save roaming charges when you are contacting with some people? Have you ever expected a device, which makes your iPhone 4 hold 2 SIM cards and work simultaneously?
 

Yes, that's it! Today, our company invented an external iPhone 4 battery case which could both protect your iPhone from being scratched and make your iPhone 4 become 3 SIM cards Tri standby. You even don't need to cut your SIM card into Mirco SIM, just insert the original SIM card, it will work without any problems. Unbelievable? But it's true.
 

This excited product is called Phone Peel, which is invented by our company Shenzhen Shineep Technology Co., Ltd. It is professionally invented for iPhone 4, get your iPhone 4 stuck on the device, it doesn't only act as a backup battery, but also it acts as a SIM card adapter which makes your iPhone extend another 2 SIM cards. How it looks like? How it works? Don't be too excited, let's first review its paramerers.
 

Network: GSM (It doesn't support to extend 3G SIM card)

Frequency: 850/900/1800/1900 MHz

Weight: 60g

Size: 120mm× 64.5mm× 15.2mm

Color: Black

Earphone jack: 3.5mm

Compatible with: iPhone 4

Applicable to: IOS 4.3.1

Battery capacity: 1200mAh

Call time: 5h

Standby time: 300h

Extend SIM card: 2

Accessories included: 1× Phone Peel, 1× Battery(1200mAh), 1× USB cable, User guider, CD