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Search in Nokia Lumia 930
I can't make voice calls
This troubleshooting guide will take you through a number of possible causes
to help you find a solution to your problem.
Turn on automatic network mode selection.

Step 1 of 8
1. Slide your finger downwards starting from the top of the screen.

Step 2 of 8
2. Tap All settings.

Step 3 of 8
3. Tap Network & wireless.

Step 4 of 8
4. Tap Mobile & SIM.

Step 5 of 8
5. Tap SIM settings.

Step 6 of 8
6. Tap the drop down list below "Highest connection speed".

Step 7 of 8
7. Tap the required network mode.

Step 8 of 8
8. Tap the Home key to return to the home screen.
Possible cause 1:
The selected network mode is not available
Solution:
Turn on automatic network mode selection.
Find "SIM settings"
Slide your finger downwards starting from the top of the screen.
Tap All settings.
Tap Network & wireless.
Tap Mobile & SIM.
Tap SIM settings.
Select network mode
Tap the drop down list below "Highest connection speed".
Tap the required network mode.
There may be different network modes available depending on where you are. Depending on the network mode selected, your mobile phone will always find the network with the highest data speed and best signal.
Return to the home screen
Tap the Home key to return to the home screen.