Guide for the HTC One (M8) - Troubleshooting - I can't make voice calls (Cause 7 of 9)

Step 1 of 8

Find "Network operators"

Slide two fingers down the display starting from the top edge of your phone.
Press SETTINGS.

Step 2 of 8

Find "Network operators"

Press Mobile data.

Step 3 of 8

Find "Network operators"

Press Network operators.

Step 4 of 8

Select option

Select one of the following options:
Select network manually, go to 2a.
Select network automatically, go to 2b.

Step 5 of 8

2a - Select network manually

Press Search networks.

Step 6 of 8

2a - Select network manually

Press the required network.
Your display will tell you if you have access to the network you've chosen.

Step 7 of 8

2b - Select network automatically

Press Select automatically.

Step 8 of 8

Return to the home screen

Press the home icon to return to the home screen.

1 Find "Network operators"

Slide two fingers down the display starting from the top edge of your phone.
Press SETTINGS.

Press Mobile data.

Press Network operators.

Select one of the following options:
Select network manually, go to 2a.
Select network automatically, go to 2b.

Press Search networks.

Press the required network.
Your display will tell you if you have access to the network you've chosen.

Press Select automatically.

Press the home icon to return to the home screen.