If your iPhone does not cope with your work and requires recovery, this problem can be solved on your own. But remember that when recovery, it is formatted by all the settings you specified before the factory, that is, you are deleted, so do not forget to back up the information you need. The procedure will take a little time and consists of the following steps.
Make sure that iTunes is downloaded to your computer, and connect your device to a computer using a USB cable.Upon completion of the entire procedure, your iPhone will be rebooted. If the recovery was no backup, follow the settings of your device.