Hi,
I have two vigour 2820n Routers. One is a backup
Now on a single ADSL circuit with one wireless everyday (even 2-3 times a day)I have to reboot the router because the internet slows right down. All our iPhones, iPads won't work on Facebook etc so run a speed test from an iPhone and nothing.
I can log into the router, do a reboot then it begins to works again for a few hours, sometimes minutes then bang reboot time. Sometimes needs a power off.
Funny thing is this happens on two 2820's.

I have just put in a Netgear and 48hrs later its still running.
Firmwares are not the most recent on the 2820 as once again I notice a new firmware and people having problems with it so I'm a bit sceptical to update it.

Any ideas?

Stick with the Netgear, I did the same 12 months ago.