Q: issues with wifi on iphone 5

I am having the exact same issue.  Apple needs a fix or I'll be glad to go back to my 4.  It was more reliable. 

I have the same problem. I took a video of Iphone 4s vs Iphone 5 Wifi Speed test.

http://www.youtube.com/watch?v=dAcUMW9N5I0

The wi-fi speed is painfully slow, what's up?! Is it some software glitch?

Yes!!! having the same issue.  my 4 is performing better

Possible Fix, Please test.

My family has 3 different iphone 5's and they are all doing the same thing.  All other iphones and ipads in the house get the expected results on speedtest.net app.  But our iPhone 5's get around half of what the other iOS 6 devices are getting over Wifi on the same servers.

I have fixed the issue on our phones by going into Settings/Wifi/Blue arrow next to your Wifi name/ and typing test into Client ID and then renew lease.

No idea why it helps but I was trying everything to get it working because I was blowing through my LTE not wanting to deal with slow Wifi.  Issue completely resolved after doing this.  Makes me think it is just a software bug that is only affecting iPhone 5's on ios 6 and will likely be fixed when ios 6.0.1 is released.

Please let me know if this helps in your situations... Could be exclusive to my Wi-Fi setup (I run all Airport Extremes and Airport Expresses).

Settings > General > Reset > Reset Network Settings is the first step in troubleshooting Wi-FI connectivity/speed issues.

Also, is this something unique to your home Wi-Fi network or is this consistent across multiple Wi-Fi networks?  If the former, try a power cycle of the router.  If the later, try basic troubleshooting from the User's Guide.

Basic troubleshooting is reset, restart, restore (first from backup then as new).  Try each of these in order until the issue is resolved.

Thanks, this seems to have worked for now

Switching to WEP works for me!

Wepii, tried your fix.  Did not change speed.  Still getting half of what I should be getting.  Thanks for suggestion.

Same issues.  Summarized here:

Major New Wifi Issues with iPhone 5 and iOS 6

I dont know what is different for me I'm getting 35mbps down and 10mbps up on my wifi here, I'm using Airport express with WAP.

I spoke to Apple this morning who told me they were aware of the WIFI situation. They told me to go to Settings>general>reset (right down the bottom)>reset network settings.  Then wait 20 minutes and reconnect to the WIFI network again.  At this stage it seems to have solved my problem, WIFI connections is strong and fast.  Fingers crossed it stays this way. The technician said if that had not resolved the problem then he had further steps we could do.

Forgot to add that you need to renew lease after doing what is suggested in my fix.

What i did for now, is turn of my passcode, is thats what seems to be the issue according to apple.  the WPA2 networks