Wifi dropping even when it shows it's connected

[chienb]

Just got 2 new SGS2, one for me and the other for my gf. WIFI via motorola surfboard sbg6580 has been having issues only with our SGS2's. Other devices connect fine to the wifi.

Not sure what's causing the problem. I've heard it has to do with the DHCP settings. Using WPA/WPA2 PSK.

Anyone experiencing the same thing?

Found this over at xda forum:

I've had two Galaxy S II phones now, and I've had the same problem with both devices. The phone's wifi is great -- when it works. Although I noticed that the death grip lowers the wifi signal bar, I can still browse the internet and download apps just fine.

The problem is that, at times, the phone will show wifi connectivity and yet, I can't browse the internet or access the App Store. I'll have to shut off the wifi multiple times and even this doesn't work 100% of the time. Shutting off the phone and turning it back on works 100% of the time.

Since this has happened to two phones, I'm beginning to question whether I have an issue with the wireless router because I have not come across this as a prevalent issue. At the same time, my laptop and a family member's iphone doesn't have the same issue.