Slow wifi network with iPhone

I have a latest model 16GB iPhone and am seeing extremely slow internet speeds over my home wifi network. Some of my friends are having the same problem.
I have a fairly modern ethernet-only ADSL2+ belkin router, which is connected to my time capsule. I'm using my time capsule to provide wireless internet access. There are two macs on the network with 802.11n cards, and a third mac with 802.11g, as well as my iPhone. I also have an airport express (i'm fairly sure it also has 802.11n) which is used exclusively for printing.
When I run a broadband speed test, I get 4 to 5Mbit on the mac with 802.11g. But on my iPhone I'm only seeing speeds of around 0.5Mbit!
Does anyone have any ideas what is going on?
Message was edited by: Abhi Beckert

Hi imobl,
Im having the same issue as virkdaman even after I updated to iOS 6.0.2. The Wifi network gets disconected frequently even when I use home wifi while my iMac is connecting to home wifi with no issue. My Iphone5 has never been jailbroken. Is it I have to wait for another iOs update to get this issue fixed?
Thanks

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Slow wifi network with iPhone

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