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iPhone very slow wifi after 7.6.1. update

23695 Views 23 Replies Latest reply: May 7, 2013 3:53 PM by pgoodwin RSS
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Mitch 751 Level 6 Level 6 (11,500 points)
Currently Being Moderated
Jan 31, 2012 5:38 AM

Just finish the updates of 7.6.1. and the aiport utility 6.

 

Every Macbook Pro (3 pieces) and iPads (one and two) are all running fine. Except two iPhone 4GS running so slow on the wifi.

 

I have reboot the airport extreme and iphones few times but do not help.

 

Anyone has this problem?

  • David Bendau Level 1 Level 1 (30 points)
    Currently Being Moderated
    Jan 31, 2012 7:51 AM (in response to Mitch 751)

    The latest update improved the wi-fi range on my iPhone 4S greatly.  I can be two floors down and still get excellent streaming video so I must be getting very good download speed. The radio mode setting on my Airport Extreme is 802.11n only (5GHz) - 802.11n only (2.4GHz).  Both channel modes are set to automatic.

  • sthlm Level 1 Level 1 (0 points)
    Currently Being Moderated
    Jan 31, 2012 2:53 PM (in response to Mitch 751)

    I agree, slowed everything down with 7.6.1. Downgraded Airport Extreme back to 7.6 and all fine again.

  • Daryn Sharp Calculating status...
    Currently Being Moderated
    Feb 4, 2012 9:29 AM (in response to sthlm)

    Yes, 7.6.1 also murdered my network 5Ghz wide channel network.  I had 20% packet loss and ~3500ms ping times.  My laptops and two other base stations dropped to the 6Mbps which happens to be the multicast rate of the main basestation.   Reverted to 7.6.0 and my problems are gone...

  • pgoodwin Level 1 Level 1 (120 points)
    Currently Being Moderated
    Feb 7, 2012 2:59 PM (in response to Mitch 751)

    My iPad and iMac are really screaming after the update. My iPhone 4 is running more slowly. What's odd is that even with it right next to the AEBS it's running slow. The iPhone 4 is listed as 802.11 b/g/n in Airport Utility in the Advanced/Wireless Clients window. When it was running slow, the signal level was OK (actually good-about the same level as the iMac) but the noise was high so the signal to noise ratio was only between 12 and 20 dB. Also the rate was at 5 and staying there 9 (not sure what the rate number is but it was much smaller than all the others clients).

     

    I turned WiFi OFF on the phone then back on again. When it came back, the signal to noise ratio was better (went to about 30-40 dB, and the rate went up to 58. Then after a few minutes, the signal to noise ratio went back to about 20 and the rate number dropped to 5 again.

     

    I'm not sure what this all telling me exactly, but I agree the iPhone seems a bit slower. It's running quite a bit below my 60 day average for download and uplaod speeds - especially a ways away from the AEBS (new 5th gen). The other devices (iMac and iPad are performing as good and even a little better than their 60 day averages.

  • pgoodwin Level 1 Level 1 (120 points)
    Currently Being Moderated
    Feb 7, 2012 3:09 PM (in response to pgoodwin)

    curiously, this is the first day in a couple of years (prior access via an Airport Express) that my wife's work computer, a Dell laptop several years old that is an 802.11a device is running good today

  • pgoodwin Level 1 Level 1 (120 points)
    Currently Being Moderated
    Feb 7, 2012 3:12 PM (in response to pgoodwin)

    Mitch 751 - I'd like to know how you decided which channel to pick. Mine's set to Auto, ch 6

  • pgoodwin Level 1 Level 1 (120 points)
    Currently Being Moderated
    Feb 7, 2012 3:14 PM (in response to pgoodwin)

    ch 6 on 2.4 GHz. 149 on 5 GHz

  • pgoodwin Level 1 Level 1 (120 points)
    Currently Being Moderated
    Feb 7, 2012 3:17 PM (in response to pgoodwin)

    I changed mine to ch 11 and the phone started running 10 times faster.

  • pgoodwin Level 1 Level 1 (120 points)
    Currently Being Moderated
    Feb 7, 2012 3:32 PM (in response to pgoodwin)

    and when I set it back to Automatic ch select, it went back to channel 6 - and it ran slow again

     

    I put it back on channel 11 and at 36 feet away through one wall, it was running 10 times faster than it was on ch 6 sitting right next to the AEBS. Strange.

  • pgoodwin Level 1 Level 1 (120 points)
    Currently Being Moderated
    Feb 7, 2012 3:36 PM (in response to Mitch 751)

    thanks a lot. I do have several other networks in the neighborhood that show up on the list, so yes, perhaps they were on ch 6 and that's why the signal level was high but the signal to noise ratio crappy. Interestingly, when I set it to ch 11, the signal level got lower (went from about -37 to -70 ) but the signal to noise ratio is more stable at about 20 dB

     

    Thanks for the help

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