iPhone 3GS users report slow or inconsistent Wi-Fi connections

I updated to O4 last night... all looked fine at first. However I listen to streaming radio across a wifi access every day, and guess what - yep - today that doesn't work...I am less than a foot away from the wifi box (which hasn't changed) and I have intermittent and loss of signal - to the point that I am now about to restore to the old os...bad news Apple...badly tested...

:-(

We're definitely seeing an issue with the 3GS performing much worse than the 3G on our 802.11g network. Various network operations take 8 to 30 seconds for the 3GS, instead of under a second for the 3G.

I have a D-Link DI-524 router and have finally fixed the connection to my iphone 3GS. I went into my router settings and turned off wireless security. On my iphone I went to my wireless network settings and picked "Forget this Network". I then selected my network again and confirmed that a browsing connection was available. Once confirmed I went back into my router settings and turned WPA-TSK back on and set a password. The phone then asked for this password which I entered and it has all been good since.

i have a 3gS,wife a 3G, all good with hers,mine loves the one router in the house, However the extender and the dlink i just bought it runs very very slow on it,Apple replace one phone already. anything i can do?

Slower download speeds on WiFi (Airport Extreme) than 3G. :(
Uploads are 2x as fast on the WiFi (~300kbps) than 3G

I upgraded to the 3G S and I noticed a lot slower buffering on the YouTube videos compaired to the 3G. Like I had to wait 10 minuets just to make the videos play the whole way thru... I really hope that the 3.1 update fixes this

That's because your MacBook Pro uses Wireless N network, which is considerably stronger than the Wireless B/G network that the iPhone utilizes.

I was having poor performance on my iPhone 3GS (purchased 2 days ago) as compared to my 1st generation iPod touch. Latency was about double and download speeds 1/2 that of the touch. Now, tonight, I cannot see my wifi network (Airport Extreme) nor my neighbors (Netgear) while the touch sees them just fine.

I have to restart my 3Gs to get my home network back up to speed after a few sessions of use. when laggy it wont connect to the internet even though its showing 1-2 bars while sat next to the router. turning off and on seems to be a tempory fix only.Back on now full bars and quick browsing, wonder how long before i need to turn off the phone?

Final update - on research the Netgear site has a point release (1.0.4.2) to the WNR834Bv1 router. After applying this point release the iPhone3Gs appears to work just fine.

Of the six items in the release notes the only one that appears to apply is the following cryptic notation...

1.Removed SIP ALG.

All other mentioned fixes have to do with the interface.

So the lesson here is - it may not be the newest device in the network - it could be something else that is not compatible with the newest device. For those experiencing problems with WiFi and 3Gs take a moment and be sure that you access point is running the latest firmware from your manufacturer. No guaranteed results - but it worked for me.