[jlh73]

So now my note 3 wont connect to any 2.4 ghz wifi. It will connect flawlessly to my 5g wifi. Any 2.4 router it will just say saved / secured. When I say any 2.4 ghz wifi I mean my parents router and my router and Mc Donalds wifi hot spot. I've tried rebooting phone and router. I thought it was my router but it just won't connect to any 2.4 ghz router. But 5g if fine. Any suggestions?

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[B. Diddy]

Go to Settings>Wi-fi, tap the Menu button, then Advanced, then Wi-Fi Frequency Band. Make sure it's set to "Auto," not "5 GHz only."

[jlh73]

I don't have a menu that says wifi frequency band.

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[B. Diddy]

Ok, try clearing the system cache partition, if you haven't done so already: Reset: Samsung Galaxy Note 3 | T-Mobile Support

[jlh73]

Unfortunately that didn't work either.

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[B. Diddy]

Hmmm. Try accessing the "secret menu" as described in post #14 of this thread: http://forums.androidcentral.com/sam...5ghz-wifi.html. Use it to turn off the Wifi Power Saving mode.

[jlh73]

All the other phones on my wifi connect to our router on 2.4 just not my note. The bad thing is it wont connect to any AT&T wifi hotspot.

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[anon8380037]

Ok, try clearing the system cache partition, if you haven't done so already: Reset: Samsung Galaxy Note 3 | T-Mobile Support

In general does safe mode help any more. It was on that link.

[jlh73]

Never tried safe mode. This is mind boggling to say the least.

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[busa2006]

Sure it's not the modem itself (reset) or the Knox

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[mavrrick]

This could be a few things.

First try turning off the phone and restarting it after a few min.
Second remove the WiFi network and add it back with wps off possible
Next check how the WiFi is working from the access point with something like WiFi analyzer

I have seen my WiFi appear not to work when the router is either overwhelmed or dealing with to much interference. Something else I have seen that will give the appearance of a good setup but just won't work is if WiFi Mac filtering is enabled. Your device will think it is all fine but then fail to complete a good connection.

Another possible problem could be the router has some combination of settings your phone just doesn't like.

Worst case scenario would be reset the phone then reset your router and see if that fixes it.

Posted via Android Central App

[jlh73]

Every other phone in my house and tablet work just not my note 3. What about Knox? Is there settings?

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[thatotherdude24]

Yes! I had this problem with mine. It's a fairly hefty thread on XDA about it. It's a hardware issue, mine required Samsung to fix it. It would only connect to 5 ghz wireless and would show my 2.4 ghz networks as out of range if I remember correctly.


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[jlh73]

Exactly. Do you have a link for the thread?

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[Michele Campbell]

I'm having this same issue right now. Did you ever find a solution? Mine wont connect at all. Just says scanning and that my network is save and secured.

[grcforce327]

Mine was caused by McAfee security. Uninstalled it ,and can connect to 2.4ghz again.