Receiving calls problem......straight to voicemail

[FuSchnickens]

Whenever I'm using my phone and I get another incoming call it goes straight to voicemail. There is no sound notifying me of an incoming call nor is there any record of it in the call log. Is this happening to anyone else? It's happened several times so something is clearly wrong. What's going on here? Any advice?

[kilrah]

I think this is dependent on the network provider rather than your phone.