Out of the blue my Whatsapp stopped working then all of sudden tried to update but kept timing out. I try to go on facebook on it but nothing works and the browser is the same. I wondered if there is a problem with my phone or 02 signal where I am. Everything has worked fine till around 2 hours ago.

Any advice?

This sometimes happens to my 8520 curve and the way I sorted it out was to take the back off the phone, take the battery out for 10 seconds replace the battery so the phone does a hard reset and it worked at that. You will lose nothing on the phone.

Will give it a bash, thanks!