Restarting your iPhone might sometimes be the simplest method to remedy an issue. This is done in order to give your iPhone a fresh start. But that doesn't imply you have to start from scratch. It basically implies you're performing a standard reset on your iPhone SE, which merely refreshes it. Because your iPhone will technically be switched off and on again, it will not cause you to lose all of your data, except for any unsaved files on the launched applications prior to this operation. Simply follow these procedures to restart your Apple iPhone se:

1. Press and hold the sleep/wake button on the right side of your smartphone at the same time.
2. Release the sleep/wake button when the 'Slide to power off' message shows on the screen. From left to right, slide the 'Slide to power off' button. Wait for the iPhone se to turn off for a few seconds.
3. Turn the iPhone se back on by pushing and holding the sleep/wake button for a few seconds, then releasing it when the Apple Logo appears.
4. Finally, allow the iPhone to start normally.
5. Check to see whether the iOS 13 Software Update is ready for download. To do so, go to Settings from your Home screen, then to General, then Software Update, and then to Checking for Updates. Wait until the iOS 13 Software Update is released.