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justme007's avatar
justme007
Aspirant
Oct 04, 2020

C3700 WIFI XFINITY SLOW. PLEASE HELP!!

C3700 cable modem/wifi router

xfinity comcast internet provider

latest firmware

 

speeds today running speedtest right noxt to router

120Mbps download speed ethernet to pc

15-20Mbps download WIFI 5GHz

1Mbps download WIFI 2.4GHz

 

I tried factory reset, changing MTU to 1400, changing channels, restarting modem, checking latest firmware, etc.

 

nothing seems to be improve the wifi speeds which are extremely slow.  as you can see the speed to the PC hardwired is fast not sure why the wifi is slow.

 

anyone have this issue and know how to fix?

 

 

 

 

9 Replies

  • wcalifas's avatar
    wcalifas
    Prodigy
    Oct 05, 2020

    Make sure your password algorythims are set to WPA2-TKIP AES on both bands and when you do the speed test try it real close to the router.

     

    • justme007's avatar
      justme007
      Aspirant
      Oct 05, 2020

      received this message following your instruction

       

      WPA-PSK(TKIP) operates at up to 54Mbps (legacy G) mode not N mode. NETGEAR recommends
      that you use WPA2-PSK(AES) to get full N rate support.

       

      also you said to test near router but that doesn't help as I want FAST WIFI speeds throughout the house.

       

       

      • wcalifas's avatar
        wcalifas
        Prodigy
        Oct 05, 2020
        Wpa2-psk (aes) yes that's what you should use. No router will give you those speeds from far away unless you're hard wired to it.