Do you want to use your iphone with T-Mobile or another GSM sim card? If so, we can unlock your iPhone to work with any GSM sim card/carrier so you are free to use your iPhone with another carrier or use it overseas with another sim card while traveling. After we unlock the phone we can also setup the internet and MMS settings so you can use all of the features with T-Mobile. We will also jailbreak your iPhone which will allow you to install applications from sources other than the App Store.