Huawei P30 lite New Edition
It's not possible to make voice calls
Solution 2 of 11: The selected network mode isn't available
There may be different network modes available depending on where you are. The network mode influences the data speeds your phone can achieve.
Press Settings.
Press Wireless & networks.
Press Mobile network.
Press Preferred network mode.
Press the required network mode.
Press the Home key to return to the home screen.