1. Connect the computer to the cell phone first and then we turn off the itunes software after we find it in the computer.
2. After shutdown we now need to enter the iphone recovery mode:
First, then press the power button to boot, the screen will appear Apple logo, do not release the power button;
Second, then hold down the main screen home button, until the screen black screen;
Third, when the screen is black screen, please release the power button, continue to hold down the main screen home button do not loosen until the computer side of ITunes detected a recovery mode of the IPhone;
3. Well, if we get to normal, we can see a "restore IPhone" in our computer's itunes.
4. After clicking, itunes automatically detects the network and discovers the iOS7.1.1 version. Then we click on the "Restore" button to continue,
5. All right, we'll just have to wait for the system to recover, and we need to activate after the recovery. (iOS7 activation method)