Step 3: Select the Restore button to start restoring the original installation - set the default root for iPhone from iTunes.
Select OK to start restoring the factory settings
Note: You should upgrade iTunes to the latest version to avoid an error while restoring the original installation. To update to the new version, at the main interface select Check for updates.
Hopefully, the above information will help you restore the original settings to bring your phone to its original state, ensuring that personal information is not stolen from the following users.
I wish you a successful recovery of your original iPhone iPhone settings!