Phone calls and texts failing

If both your phone calls and text messages are failing at the same time, your phone has lost its connection to your mobile carrier’s network. This is usually caused by a temporary network glitch, a displaced SIM card, or a cellular service outage. 

Try this to reset your network settings

This forces your phone to completely disconnect from the nearest cell tower and search for a fresh connection. 

• Swipe down (or up) to open your phone's Control Center or Quick Settings panel.
• Tap the Airplane Mode icon to turn it on.
• Wait 10 to 15 seconds, then tap it again to turn it off.
• Wait a moment for your signal bars to return, then try a test call or text.