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Enable and disable Airplane Mode: Start the Settings app and turn on Airplane mode and wait about 30 seconds and turn it off again.Disable and enable Cellular: Start the Settings app and go to Cellular and toggle off Cellular Data wait about 30 seconds, and turn it back on.Start the settings app and go to General > Software Update. You can easily update your iPhone wirelessly. Check for updates and make sure that your iPhone is running the latest version of the iOS software. Update your iPhone: A new update may be available.Then find the Phone app and swipe up on the Phone app card to close it. iPhone 8, iPhone 7, iPhone 6S, iPhone 6, iPhone SE and older models: Double press the home button.Then tap the Phone icon to reopen the app. Find the Phone app, and touch and hold the up and press the red minus (-) icon to close. This will reveal the most recently used apps. iPhone X, iPhone 11, iPhone 12, iPhone 13 or iPhone 14: Unlock your device and swipe up.Do not worry, your data will not be erased. Force close the Phone app and restart: You can close the Phone app and restart again.You can also shut down your iPhone by (a) (if it is an iPhone X, iPhone 11, iPhone 12, iPhone 13 or iPhone 14) pressing and holding the side and one of the volume buttons (up or down) (b) (if it’s iPhone 8, iPhone 7, iPhone 6S, iPhone 6, iPhone SE or earlier) pressing and holding the side button. You can shut down your device by Heading to Settings > General > Shut Down. Simply restart your device to fix this problem.
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