Your iPhone relies on its operating system and software to control the numerous features of the smartphone. If the disabled or "Recovery" mode of your iPhone suddenly appears on the screen, use iTunes to restore it to its normal operating condition. Getting your iPhone out of recovery mode will not harm the personal files or data saved to the phone's hard drive.
Plug one side of the iPhone cable into an open USB port on your computer.
Insert the other end into the port on the bottom of the iPhone. iTunes will automatically appear once the phone is recognised.
Click "OK" in the message that appears to get the iPhone out of the disabled mode.