What happens when Apple 4s erases all the content and settings?

Apple 4S erased all the contents and settings, which is equivalent to returning to the official firmware that has just been brushed. It is in a clear state, just like the bare metal just bought back, and the version of the firmware itself will not change.

Clear the contents and settings as follows:

1. Back up the data in the iPhone first, so as to recover the data later. Select the backup method according to the iOS version used by the user and the synchronization preference of the user. It can be backed up to a computer through iTunes or to the cloud using Apple's iCloud.

2. In addition, make sure that the iPhone is fully charged or connected to a power supply when performing the following operations.

3. The specific method steps are as follows:

4. Open "Settings" and find "General";

5. Slide to the bottom and click "Restore";

6. Click Erase All Contents and Settings. If you set a password, you will be prompted to enter it.

7. After entering the password, the system will confirm to the user again, and the user can click "Erase iPhone".

What happens if the iPhone erases all the content and settings? Will become the original state. You'd better back up your data and settings before deleting them.