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I just got cable internet installed (Comcast). It claims that my down speed should be 25mbit. Over wifi, I get close to that on my laptop, but only about 8 on average with my iPhone/iPad.

I'm using testmy.net in the browser on all devices. I have an ARRIS / Motorola SurfBoard SB6141 DOCSIS 3.0 Cable Modem and a Medialink Wireless N Broadband Router. iPhone 5 and iPad 2.

I read somewhere that disabling WMM and the firewall on the router would help (is this even a safe idea?). I've tried both, and neither seem to make much of a difference, if any at all (sidebar: I've noticed that my download speeds vary wildly with cable internet... on my laptop, I'll get 12 down, then 22 five minutes later. Is this typical for cable internet?).

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    Which iPhone / iPad do you have?
    – sgtbeano
    Commented Nov 13, 2013 at 15:57
  • Also, have you seen this thread? discussions.apple.com/message/15065064#15065064
    – sgtbeano
    Commented Nov 13, 2013 at 15:59
  • And there's no inherent danger in turning off WMM or QoS as described in the Apple discussion. However it may affect other devices on your network such as streaming boxes etc.
    – sgtbeano
    Commented Nov 13, 2013 at 16:02
  • @sgtbeano Question edited with iPhone 5 and iPad 2... thanks for pointing out that omission.
    – Sam
    Commented Nov 13, 2013 at 16:03
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    Lots of people on the apple discussion mentioning the iPad 2 - I'm almost all the way through it now but turning off WMM and QoS seems to be helping a lot, as well as turning off multiple mode too i.e. n rather than a/b/g/n etc. This page discussions.apple.com/thread/2398063?start=150&tstart=0 has a good post on checking channel space on your wireless too.
    – sgtbeano
    Commented Nov 13, 2013 at 16:29

1 Answer 1

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It's the Comcast router, don't change your Apple settings! Turn off your personal router. Using a pen, press the reset button on the top of the back of your Comcast box and hold for a FULL 30 slow count seconds. Let go and allow the router to reboot, say at least 5 minutes. Go watch TV for a while, don't rush this step! Come back and turn on your personal router. All fixed!

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