Dg834g Or Dg934g My IPhone 3gs Wireless Is Really Slow, I Got It Tested And It Goes Around 5KB/s. Using DG834g (netgear) Router?

My iPhone 3gs wireless is really slow, I got it tested and it goes around 5KB/s. Using DG834g (netgear) router? - dg834g or dg934g

I think it's something to do with the Windows firewall or my router to Netgear DG834G. Should I open ports?