Thanks guys, this sounds like it could be the issue, I'll definitely try the android app and change router channel tonight.

Note that the PC and PS3 are about 3 meters apart in the same room, so not sure why the PC is not having wireless issues (perhaps the network adapter is better on the PC), but I'll try anyway and keep fingers crossed.

I can always keep the wire in, but wireless would be much easier if I can get it sorted since I'm renting the house, so thanks for the tips.