If you are still unable to restart your iPhone and have exhausted all other options, restoring it as a new iPhone can be a last resort. This will erase all data and settings on your device, essentially starting from scratch. Connect your iPhone to a computer with iTunes, select your device, and choose 'Restore iPhone.' Follow the on-screen instructions to complete the process. Keep in mind that this will erase all your data, so make sure to have a backup if possible.
