I can't make video calls

The phone is set to use the wrong network mode

Turn on automatic network mode selection.

1 of 8 steps Press Apps.
2 of 8 steps Press Settings.
3 of 8 steps Press More settings.
4 of 8 steps Press Mobile networks.
5 of 8 steps Press Network mode.
6 of 8 steps Press GSM/WCDMA (Auto mode), GSM only or WCDMA only.
7 of 8 steps Press the Home key to return to standby mode.