- Remove the iPhone SIM card and reset it. ...
- Restart iPhone. ...
- Turn Airplane Mode On and Off. ...
- Update iOS. ...
- Make sure your phone account is valid. ...
- Check for an iPhone Carrier settings update. ...
- Test for a malfunctioning SIM card. ...
- Contact Apple tech support.
Why does my phone say no SIM when I have my sim in?
If you get an alert that says Invalid SIM or No SIM Card installed, follow these steps. ... Make sure that the SIM tray closes completely and isn't loose. If you use a SIM tray from a different model iPhone, iPad, or from another phone manufacturer, it might not fit properly. Try using another SIM card.Sep 23, 2021
How do I reset my iPhone sim?
- Press the "Home" button on your iPhone. Slide your finger across the "Slide to Unlock" bar. Your home page will load. ...
- Tap the "Settings" icon.
- Tap the "General" tab.
- Tap "Reset" at the bottom of the page. A new page will open.
- Tap "Erase All Content and Settings." People are Reading.