Check your iPhone settings
Go to Settings and turn on Airplane Mode, wait five seconds, then turn it off. Check Do Not Disturb. Go to Settings > Focus > Do Not Disturb and make sure it's turned off. Check for any blocked phone numbers.
If you can't make or receive calls on your iPhone - Apple Support
Can't send or receive messages then try these steps first
- Restart your device: ...
- Check your network connection. ...
- Check with your carrier to see if the type of message you're trying to send, like MMS or SMS, is supported.
- If you're trying to send group MMS messages on an iPhone, go to Settings > Messages and turn on MMS Messaging.
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If you can't send or receive messages on your iPhone, iPad, or ...
If the issue persists, you can try resetting all settings on your iPhone. This will not erase your data but will reset all personalized settings to their default values. Go to Settings > General > Transfer & Reset > Reset > Reset All Settings and confirm the action. Note that you will need to reconfigure your settings afterward. All settings—including network settings, the keyboard dictionary, the Home screen layout, location settings, privacy settings, and Apple Pay cards—are removed or reset to their defaults. No data or media are deleted.
- Reset All Settings: Return iPhone settings to their defaults - Apple Support:- Return iPhone settings to their defaults
- You can return settings to their defaults without erasing your content.
- If you want to save your settings, back up your iPhone before returning them to their defaults. For example, if you’re trying to solve a problem but returning settings to their defaults doesn’t help, you might want to restore your previous settings from a backup.
- Make sure you have the latest updates installed.
- Update Over-the-Air (OTA) —> Update your iPhone or iPad - Apple Support (IN)
- Update using iTunes/Finder —> Update your iPhone, iPad, or iPod touch - Apple Support (IN)
