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Old June 9th, 2012, 11:45 AM   #1 (permalink)
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Exclamation [Samsung Galaxy S III GT-I9300] 5 GHz WiFi problems

I was wondering if anyone else is having trouble finding a 5 GHz AP with their Samsung Galaxy S III GT-I9300?

* Purchased from Handtec.co.uk
* WiFi frequency band is set to auto (5 GHz & 2.4 GHz)
* Picks up all 2.4 GHz APs in and around my house fine
* Does not pick up any 5 GHz AP (SSID)
* Tried placing the phone near the router still does not pick up 5 GHz (My S2 and Nexus pick it up from adjacent rooms, kitchen, etc.)

I use a dual-band D-Link router (bought in 2011)

* My Samsung Galaxy S2 LTE, my Samsung Galaxy Nexus (regular non-LTE) both pick up my router's 5 GHz SSID but they were bought from North America which brings me to wonder if there's a problem with the UK/International S III picking up 5 GHz on North American routers?

Any advice, input would be appreciated.

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Old June 9th, 2012, 12:58 PM   #2 (permalink)
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I've read before that changing the channel can help. Try downloading wifi analyser from the google play store and it'll help you identify a less crowded channel to try.
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Old June 9th, 2012, 02:56 PM   #3 (permalink)
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I've read before that changing the channel can help. Try downloading wifi analyser from the google play store and it'll help you identify a less crowded channel to try.
Hi,

Changing the channel on the router you mean?
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Old June 9th, 2012, 03:00 PM   #4 (permalink)
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Hi,

Changing the channel on the router you mean?
Yeah.
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Old June 9th, 2012, 09:35 PM   #5 (permalink)
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Gonna take a wild guess here, but I don't suppose you have a cordless phone in your house? One operating in the 5ghz range? If so, unplug it completely. Try your mobile.
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Old June 9th, 2012, 11:48 PM   #6 (permalink)
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Problem solved guys!

I am now able to see both 2.4 GHz and 5 GHz channels and both are working fine

I changed the 5 GHz channel to a lower number. It was set to 145 before. Ty!
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Old July 21st, 2012, 06:28 AM   #7 (permalink)
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Problem solved guys!

I am now able to see both 2.4 GHz and 5 GHz channels and both are working fine

I changed the 5 GHz channel to a lower number. It was set to 145 before. Ty!
hey,buddy,how do u change?can u teach me?
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Old July 21st, 2012, 07:14 AM   #8 (permalink)
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hey,buddy,how do u change?can u teach me?
It varies from router to router. Which router do you have?
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Old July 27th, 2012, 11:18 PM   #9 (permalink)
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My Samsung GS3 can see my wireless access point broadcasting in all modes but will only connect to 802.11b or g @ 2.4GHz. If I try to go to 802.11n @ 2.4GHz or 5GHz it will attempt to connect over and over but fail.

I tried changing the channel on the router and also tried the auto channel scan neither of which helped.

Any ideas?
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Old August 27th, 2012, 04:30 PM   #10 (permalink)
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It turned out that the DHCP service on my router allocated the same IP address as a static device on the local network.

I changed the phone to a non conflicting static IP address and gateway and the problem went away.

Odd that I never had that as a problem in over two years with an HTC Incredible. My guess is that the Galaxy has a weal wi-fi implementation and if it hits a snag it just gives up.
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Old September 19th, 2012, 08:19 AM   #11 (permalink)
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My wifi frequency band option is missing on my s3. Can u tell me how to get it back
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Old April 15th, 2013, 05:51 AM   #12 (permalink)
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I also cannot find a way to change the wifi band. Where is this located, or where should it be located?

I don't really need to change it as it is working at 48 MPS on a .11g router. I am simply trying to confirm it works on wireless .11n. My .11n router died and I had to fall back to my old one. I need to get a new router, but I am trying to confirm that all my wireless devices will work on .11n as it is better not to use mixed mode, but to set it for .11n only. Information on what types of wifi the S3 works on seems to be well hidden.
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Old April 16th, 2013, 06:50 PM   #13 (permalink)
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Originally Posted by TambourineMan View Post
I also cannot find a way to change the wifi band. Where is this located, or where should it be located?
S3 Service Menu:
1. Open up the Galaxy S3 phone dialer
2. Dial *#0011#
3. Look for the “ServiceMode” screen and press the left menu button
4. Select “WiFi”
=> Display the Wifi connection details, e.g. if the device uses the 2.4Ghz or 5.2Ghz band, very interesting as this info
is not displayed elsewhere!
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Old July 15th, 2013, 05:56 AM   #14 (permalink)
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hi there

I am trying to connect my samsung galaxy s3 to my laptop's wifi hotspot. But when I go in the wifi option it doesnt show the wifi hotspot's name. Even if I enter its details manually it shows 'not in range', Where as I can see it on my another phone (Nokia N97).

Please help!!!!

PS: Sorry If I am asking this question in the wrong community/topic/discussion.
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