With this Dual SIM adapter, you will avoid dealing with high international charges and roaming issues when you travel from one country to another.
One iPhone 4G with 2 SIM Cards*
No need to cut your external SIM CARD
Comes with a Black case to protect the dual SIM card and your iPhone back
* To be able to use two SIM cards from different providers its mandatory your iPhone 4 is SIM-free and not restricted exclusively to a specific carrier.