Slow to no wifi speed on 4s after ios 6 update

yesterday I updated my 4S to IOS 6 and now my wifi speed is zero. I've restored the phone, deleted the wifi network and rebooted everything and I still cannot even complete a speed test on the phone, it's so slow. It will not pull up a map or download an upgrade.

I, too, had slow WiFi connections when able to connect at all after upgrading my 3rd generation iPad to IOS 6. I think I found a way around the problem this morning and have notified my Apple support contact with my findings.
The following provides a little background about my specific problem:
After upgrade to IOS 6, home network wouldn't connect
Tried all the suggested options (recovering iPad- twice, Auto proxy, turning wireless and airplane mode on/off, rebooting iPad, disabling wireless security) none of which solved problem
finally able to connect by reconfiguring my Linksys E1500 router to use channel 6, confusing because it use to work, but at least I was connected
In my office I had great connectivity with no modifications - ran speedtest and had >18Mbps/sec download speed
Figured it was my router so was getting ready to buy an AirPort, when I found that my Mac-mini could be configured to operate as a router
Configured the Mac to share my ethernet and got excellent connectivity on iPad >18Mbps/sec, same as in the office
Tried all Linksys router channels and found could only connect on channels 6, 7 and 8 and only when channel width was set to 20Meg. Could only connect using 20/40Meg channel width on channel 6.
Throughput on channel 6 was: 0.72Mbps down, 1.05Mbps up with a ping time of 156Msec (Note router was in N/B/G or "Mixed" mode)
Reconfigured the Linksys router to only use B/G mode and the Auto channel selection now works and got the following throughput: 6.79Mbps down, 3.30Mbps up and 975Msec ping (Note this was about 50 feet from the router - same conditions as above. When in the same room as the router got: 19.58Mbps down, 3.38Mbps up, 982Msec ping)
So for my specific problem I could acheive acceptable WiFi performance by downgrading my LinkSys router to not use "N" mode. Since N mode works between the iPad and the Mac I suspect there could be an issue with Apple's implementation of the protocol, but I've supplied this information to Apple in the hopes they can address my issue in their next patch release.
I hope this information is useful to others.

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Do any of you have a solution to fix this?
Thank you!

Look at iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
Additional things to try.
Try this first. Turn Off your iPad. Then turn Off (disconnect power cord for 30 seconds or longer) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
Go to Settings>Wi-Fi and turn Off. Then while at Settings>Wi-Fi, turn back On and chose a Network.
Change the channel on your wireless router (Auto or Channel 6 is best). Instructions at http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
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http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
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http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
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https://discussions.apple.com/thread/4010130
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~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
 Cheers, Tom

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I used to be able to receive FaceTime calls when ipad was in sleep mode but ever since this past update I don't. I had problems like everyone else wi connecting to the Internet but I was able to fix that. Is there any way the ipad can stay connected while in sleep mode.

Look at iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
Additional things to try.
Try this first. Turn Off your iPad. Then turn Off (disconnect power cord for 30 seconds or longer) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
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Change the channel on your wireless router (Auto or Channel 6 is best). Instructions at http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
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http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
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iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
Fix iPad Wifi Connection and Signal Issues http://www.youtube.com/watch?v=uwWtIG5jUxE
Fix Slow WiFi Issue https://discussions.apple.com/thread/2398063?start=60&tstart=0
Unable to Connect After iOS Update - saw this solution on another post.
https://discussions.apple.com/thread/4010130
Note - When troubleshooting wifi connection problems, don't hold your iPad by hand. There have been a few reports that holding the iPad by hand, seems to attenuate the wifi signal.
~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
 Cheers, Tom

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See:
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This does not work in my case.
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The iPod Touch 8GB connected seamless to this network and anything was ok. After some days i could no longer connect, the iPod told me "connection to network 'networkname here' failed". Deleting the network and reenter the (correct) passphrase was no help, but changing the SSID on the router was helpful: the iPod could connect again ... for several days.
Now things stopped working again. Resetting network settings did not help either.
The iPod can see the network, is asking me for the passphrase and after several seconds telling me: can't connect. On the router log i don't even see a dhcp request, but other laptops work fine with the same wifi network.
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2. Go to Settings>Wi-Fi and turn Off. Then while at Settings>Wi-Fi, turn back On and chose a Network.
3. Change the channel on your wireless router (Auto or Channel 6 is best). Instructions at http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
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http://ipadinsight.com/ipad-tips-tricks/potential-quick-fixes-when-your-ipad-won t-connect-to-your-wifi-network/
~~~~~~~~~~~~~~~~~~~~~~~~~
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http://tabletcrunch.com/2012/09/27/fix-ios-6-wifi-problems/
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~~~~~~~~~~~~~~~~~~~~~~~
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iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
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http://ipad.about.com/od/iPad_Troubleshooting/ss/How-To-Fix-My-Ipad-Wont-Connect -To-Wi-Fi.htm
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How to Quickly Fix iPad 3 Wi-Fi Reception Problems
http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
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http://www.pcmag.com/article2/0,2817,2372811,00.asp
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How To Fix iPhone, iPad, iPod Touch Wi-Fi Connectivity Issue http://tinyurl.com/7nvxbmz
Unable to Connect After iOS Update - saw this solution on another post.
https://discussions.apple.com/thread/4010130
Note - When troubleshooting wifi connection problems, don't hold your iPad by hand. There have been a few reports that holding the iPad by hand, seems to attenuate the wifi signal.
Some Wi-Fi losses may stem from a problematic interaction between Wi-Fi and cellular data connections. Numerous users have found that turning off Cellular Data in Settings gets their Wi-Fi working again.
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Wi-Fi or Bluetooth settings grayed out or dim
http://support.apple.com/kb/TS1559
~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
 Cheers, Tom

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