I can't receive any voice calls

Missed calls are diverted too fast

Set divert delay.

1 of 12 steps Press the menu icon.
2 of 12 steps Press Settings.
3 of 12 steps Press Call.
4 of 12 steps Press Call forwarding.
5 of 12 steps After a moment the current settings are displayed.Press one of the following options:
6 of 12 steps Always forward
7 of 12 steps Forward when busy
8 of 12 steps Forward when unanswered
9 of 12 steps Forward when unreachable
10 of 12 steps Key in +61101 and press Enable.
11 of 12 steps Press the Home key to return to the home screen.