The iPhone for China Telecom includes all of the features of the iPhone 4S. This iPhone can only be used on the China Telecom network within mainland China and on the networks of China Telecom roaming partners when traveling outside of mainland China. It cannot be used with a SIM card from any other carrier. In order to start using this iPhone, you will need an active micro-SIM card from China Telecom. To start using it, simply insert the micro-SIM card into the slot on your iPhone and turn it on by pressing and holding the On/Off button for a few seconds. Then follow the onscreen instructions to set up your phone.