What is the name of this horror movie/ thriller?

[Zoe]

I saw this ages ago but in my head its got mixed up with films like mimic and moth-mann prophecies.
But basically it starts off with this small town and in some houses people have disappeared, and the guys going round the house trying to find the occupants but there is no one and then the phones are ringing and there is a strange crackling noises but it kinda sounds like talking?
Anyway this kind of stuff keeps happening and he gets more people involved with investigating these strange goings on and I know at one point this big moth thing tries to get into a window to attack his lady friend?
Anyway i can't remember much else except at the end they're all in this government bunker and are trying to figure out how to destroy this thing which has become powerful and is taking over towns people (there is a scene in a church where lots of people in radiation kind of suits get taken over/killed) and then they realise the creature has almost turned into God or something? Not sure about that but there is a reference to religion. And eventually they figure out a really basic chemical to destroy it.
Grateful for any help!