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Check those apple links I posted earlier. You'll have to sign in with your apple id on at least one of them, maybe both.

Ok! Everything is set to what Apple suggest except the channel width. I have no way of changing this but does that not also come under 802.11n mode? I have three options...

54mb
145mb
300mb

which one should i choose?

Security is wpa2 aes
2.4ghz
channel auto
 
I too saw a huge slow down in wifi speeds compared to 3G a few days ago but everything is good today. I may have rebooted the phone between now and then, don't remember.
 
I too saw a huge slow down in wifi speeds compared to 3G a few days ago but everything is good today. I may have rebooted the phone between now and then, don't remember.

Reset your network settings. It'll then reboot the phone, and mines been working fine since I did it and I hope it lasts.
 
Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3)

I'm getting 23 ping, 26.49 d/l, and 11.7 u/l. My 4 never got that fast, but my 4S flies!
 
Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3)

I'm getting 23 ping, 26.49 d/l, and 11.7 u/l. My 4 never got that fast, but my 4S flies!
 
I was having slow wifi speeds on my 4S (laptop sitting right next to it was getting 30Mbps down meanwhile the iPhone was seeing 2-3Mbps. I thought I had tried everything (deleted wifi profile, and re-added it, reboot router, change Wifi channel, txpower etc. ) Nothing worked & I was ready to exchange the phone thinking it was a bad wifi radio chip or something.

Long story short I followed the advice here and did a "reset network settings" and lo and behold it actually worked. Now getting 20-22mbps on the iPhone. Hope it "sticks" ... cheers guys for the advice
 
Well... that didn't last long. Slowed right back down after about 20-30 mins. Gearing up to return this 4S for a faulty wifi radio??
 
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