New iPhone 5 wont connect to my home wifi

Hi all.

I'm Raff and this is the very first time I have posted here. I am in Melbourne, Australia.

I recently bought a new iPhone 5 from Telstra. The phone itself is great. My problem however is that it wont connect to my home wifi. I have a cable service with Telstra, and my modem is a Netgear CG3100D-2 BPAUS.

We have 2 laptops and a kindle, and they both connect fine. When I try to connect the iPhone, it can see the network, asks me to enter the password, but all that happens is the "circle" comes up and just keeps on spinning around.

The phone connects to the internet via Telstra ok, but, wont connect to my home network.

Have called Telstra and they tell me its a common problem with the iPhone5

Im thinking it could be something between the iPhone and the Netgear router.

Anyone have any ideas on this?

Cheers,

Raffa