There could be several reasons why your iPhone 13 is not ringing on incoming calls. Here are some steps you can take to troubleshoot and resolve the issue:
1. Check the Ring/Silent switch: Verify that the Ring/Silent switch, located on the side of the iPhone, is not switched to silent mode. If it is, toggle it to the ring mode.
2. Increase the volume: Ensure that the volume level on your iPhone is turned up. You can do this by pressing the volume up button on the side of the device or adjusting it in the Control Center.
3. Check the Do Not Disturb mode: Check if the Do Not Disturb mode is enabled. Swipe down from the top right corner of the screen to open the Control Center and ensure the crescent moon icon is not highlighted. If it is, tap on the icon to disable Do Not Disturb mode.
4. Verify the sound settings: Go to Settings > Sounds & Haptics and make sure that ringer and alerts volume is turned up. You may also want to check the Ringtone setting to ensure it is set to a desired sound.
5. Update iOS: Keep your iPhone up to date with the latest version of iOS. Sometimes, software updates address bugs or issues related to incoming call notifications. To update, go to Settings > General > Software Update.
6. Check for call blocking: Confirm that the incoming calls are not being blocked or restricted. Go to Settings > Phone > Call Blocking & Identification and make sure no numbers are blocked that could be associated with the incoming calls you are missing.
7. Restart your iPhone: Restarting your iPhone can help resolve various software glitches. Press and hold the power button until the slider appears, then drag the slider to turn off your iPhone. After a few seconds, press and hold the power button again to turn it back on.
8. Reset network settings: If the issue persists, you can try resetting the network settings on your iPhone. This will reset your Wi-Fi networks, Bluetooth connections, and cellular settings. Go to Settings > General > Reset > Reset Network Settings.
If none of the above steps resolve the issue, it may be necessary to contact Apple Support or visit an Apple Store for further assistance. They can help diagnose any underlying hardware or software issues that might be causing your iPhone 13 not to ring on incoming calls.