1. Before the operation we prepared an itunes software installed in the computer Oh, as shown in the following figure
2. Then I turn on itunes and connect my phone to my computer, as shown in the picture
3. After the connection your itunes software prompts you to "detect a recovery-mode IPhone" message, as shown in the following figure.
4. If itunes does not warn ' detects a recovery-mode iPhone, ' We can turn the Apple phone off and press the ' Power +home ' button to go to the screen and force power off the device.
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 black screen, please release the power button, continue to hold down the main screen home button do not release, until the computer end of the
5. Then we found our device on itunes and we can click on the "Restore IPhone" button, as shown in the picture
6. itunes will now detect the latest version of the IOS7 system, we click the "Restore" button to continue.
7. Then the process will be a long time, we just slowly wait for oh.
Tip: This tutorial is available for all iOS device troubleshooting failures, including Apple devices like ipad,ipod,iphone or devices that use Apple's iOS system, which can be addressed by article.