Mobile phone reloading course without jailbreaking

If you haven't escaped from prison, you'll have to reinstall and remove others. You can connect to itunes and click Restore Mode to reinstall the mobile version. The method is as follows.

Back up mobile phone data

Download the latest version of itunes first. Remember, it needs to be the latest version, otherwise it may lead to unknown errors when reinstalling. After installation, open it, connect the phone, and click the phone icon in the upper left corner. Click backup after entering, because reinstalling will erase all the contents of the phone.

Select the recovery option

After the backup is completed, select the restore option button on itunes, and click OK to restore in the pop-up selection box.

Download mobile phone firmware

Itunes will pop up a page prompting that everything will be erased, and it will verify the recovery with the Apple server. Click OK, and iTunes will automatically download the phone firmware.

Reinstall firmware

When the verification and file extraction are completed, iTunes will automatically reinstall the downloaded firmware version for the mobile phone, and then reactivate the mobile phone after the installation is successful.