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WiFi issues disconnects etc (fixed for me)

Hello, I had the same issue where my GS3 kept disconnecting and reconnecting to my wifi. I did the *#0011# thing and it worked. I had to turn off my phone last night as my battery was dying and I didn't have my charger with me. When I came home and charged my phone, I noticed that it was happening again so I again did the *#0011# thing and it fixed it, however now my screen won't auto turn off/lock. I have to manually lock my screen. My settings are set to auto timeout after 30 seconds but its still not doing that. Has anyone else had this issue?
 
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Hello, I had the same issue where my GS3 kept disconnecting and reconnecting to my wifi. I did the *#0011# thing and it worked. I had to turn off my phone last night as my battery was dying and I didn't have my charger with me. When I came home and charged my phone, I noticed that it was happening again so I again did the *#0011# thing and it fixed it, however now my screen won't auto turn off/lock. I have to manually lock my screen. My settings are set to auto timeout after 30 seconds but its still not doing that. Has anyone else had this issue?


I just did it - screen will not time out. I set it for 15 seconds - it just stays on - I had to manually turn it off.
 
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I've also had issues with my Galaxy S III. It kept coming up with 'authentication error' when I tried to connect to my home wifi.

It was encrypted with a 64 bit key WEP, and it would connect fine with the encryption turned off. I have changed it to a 256bit TKIP WPA-PSK key and it works fine.

The rest of the above didn't work.
 
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I had the same problem with 3 Galaxy S3 32GB phones. Took them in to 2 Sprint locations and their techs were unable to connect them to their own in-store wifi routers.

Tried every trick posted to date:
- Advanced Wifi: Shut off notifications
- More Settings > Disabled Kies services
- Service Mode *#0011# > Wifi > Shut off Wifi Power Save Mode
- Tried every DCHP and Static IP connection possible (would occasionally connect with static IP but never hold it).

The only clue was that at SOME open public locations, the wifi connectivity was fine.

The fix was replace an 8-year old router. The Galaxy S3 hates WEP or the old WPA1 standard...and for good reason, as these are completely insecure protocols.

While there are many fancy new routers available, I selected a refurb'ed Netgear WNDR3400 for $40 online. Im using WPA2-PSK AES wireless security, can connect 2 Galaxy S3 phones (1 stock/unmodified, 1 optimized/debloated) and can connect both either DCHP or Static IP. In this configuration, the S3 does not need the wifi powersave mode disabled to remain connected.
 
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Hi All,
My Galaxy S III still will not hold wifi in any location in Vancouver CA. I know it is either the hardware or software since iPhones, laptops, etc. are working in all of the wifi zones I've tried. We have tried all of the fixes people have suggested here to no avail.

In my case, the phone is an AT&T and holds wifi when in the states but will not hold wifi when in Vancouver. Samsung chat tech says a fix is on the way but that's been two weeks now. Anyone having the same problem or have any advice.

Love the phone otherwise but will probably exchange it for iPhone if no resolution quickly.
 
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I have had the phone 16 days now. First week was okay but this last week my WiFi has just been loosing connection like mad. All the time I had to toggle it to get it going after sleep. And even then it would loose connection multiple time pr minute.

Basically what user 'Muskstick' suggests is going into service mode (*#0011#), hit menu button, select wifi and disable the power save mode.

It's been working normally ever since :)

/Aero

i've already tried the *#0011# thing and wi-fi on my S3 still disconnects if i leave the phone for a while. no matter how hard i try , i couldnt fix this error about wi-fi , it's just keeps disconnect and re-connect after i un-lock the screen and start using it
 
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Hello, I had the same issue where my GS3 kept disconnecting and reconnecting to my wifi. I did the *#0011# thing and it worked. I had to turn off my phone last night as my battery was dying and I didn't have my charger with me. When I came home and charged my phone, I noticed that it was happening again so I again did the *#0011# thing and it fixed it, however now my screen won't auto turn off/lock. I have to manually lock my screen. My settings are set to auto timeout after 30 seconds but its still not doing that. Has anyone else had this issue?
The day after I made this post I brought my phone back to Verizon and they replaced my phone. I have had no issues and its been several weeks. I made no changes to my wifi settings or hardware. Also since I havent done the *#0011# thing, my battery life is much better.
 
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I posted something in another S3 wifi thread, but thought I'd post here too.

My husband and I just received our 32GB s3's this weekend. My wifi has no issues. His is doing the same things as described above. We did follow the steps for the *#0011# and that works temporarily but is not a permanent fix.

Because my s3 is working fine, we know it's NOT the router.

Has anyone come up with any other ideas? We'll be calling Verizon tonight.

Mine usually stops once a week or so so I may try this power saver trick.
The quck fix I've been using is rebooting my router. It is only temporary.
Type my ip into your browser, copy it and paste ip # in add bar.Takes you to your router page. Go to setup wizard and click next until it reboots.
Kind of a pain but takes less than a minute. Works for my LG and girlfriends Samsung.
 
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