Slow wi-fi (especially 802.11g) with iPhone 3G

[ludo2]

Hello,

I have a problem with wi-fi on my iPhone 3G. While the phone normally joins my network (access point: Netgear WG602v3, firmware 1.2.5) and reports a good signal strength (3 bars), the connection is very slow. I have used tests like testmyiphone.com and the results are betweend 200 kb/s and 400 kb/s. Moreover, Youtube needs a very long time to buffer videos. My Macbook Pro is using the same access point without any of these problems.

Now the interesting part: After setting the access point to 802.11b only, the iPhone works fine. As soon as I switch back to 802.11g only oder 802.11b/g combined the same problems occur.

Things I have already tried:
- Rebooting the iPhone
- Rebooting the access point
- Updating the iPhone to 2.0.1
- Updating the access point to the latest firmware (1.2.5)
- Restoring the iPhone
- Disabling wi-fi encryption
- Various channels to avoid interference
- Different RTS threshold and fragmentention length settings
But nothing helped.

In addition, I tested my iPhone at a local T-Mobile hotspot (I am from Germany). While I obviously couldn't change the access point settings, I did not get better results anyway.

Some users seem to have similar problems:
http://forums.whirlpool.net.au/forum-replies-archive.cfm/1015942.html
http://forums.whirlpool.net.au/forum-replies.cfm?t=956397&p=5
http://www.youtube.com/watch?v=92oGshWbKGI

Have you experienced similar problems with your iPhone 3G and 802.11g? Or is wi-fi working for you? Please let me know! Thanks for your help!

 

[ludo2]

I have done further tests and discovered something even more interesting: Upload seems to work with full speed both with 802.11b and g. Moreover, my father's iPod touch shows exactly the same behavior. I am not sure if this a problem with
- my access point
- my iPhone and my father's iPod touch
- the 2.0 software?
As the problem occurs on both devices and nothing improved on the hotspot, a software error seems likely. But shouldn't more users have the same issue?

 

[brianj]

I had an unstable wifi connection. Couldnt connect even though it was the right pass...

My wireless router is an apple extreme base station and I fixed the problems by changing channel and dissabling all ipv6 stuff on the router..Then it worked like a charm(No idea how this got enabled in the first place).