Problems making/receiving calls
After each troubleshooting step, check to see if your issue is fixed.
icon is missing
If disappeared from your home screen, you just need to add a shortcut for the Phone app.
SIM card not recognized
If you see or in the status bar or a message that the SIM is not recognized:
1. Turn your phone off and then on again.
Press and hold the Power button, then touch Power off. Then turn it on to establish a new
connection with the network.
3. Turn off your phone, then remove and reinsert the SIM.
4. Contact your carrier to make sure your account is set up properly.
5. Ask your carrier to replace the SIM card.
6. Perform an external phone reset.
No signal
1.
If you usually have a signal but the status bar shows in your current location, move
to another area where you can receive a signal, like outdoors. If you’re uncertain whether
your carrier provides service in that location, check the coverage map on your carrier’s
website.
2. If airplane mode is on, turn it off.
3. Turn your phone off and then on again.
4. Check for app updates.
5. Check if a software update is available for your phone.
6. Check that the Preferred network type is set to Global. ( Settings > Network & internet
> Mobile network > Advanced > Preferred network type.) If you’re experiencing service
issues when it is set on Global, try a different setting.
7. Remove your SIM card and reinsert.
8. Use safe mode to see if apps you installed are causing the issue and uninstall as needed.
9. Reset the phone.
Fix a problem : Call and SIM issues
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