Did ALL of these suggestions AND factory reset. Still completely fluky wifi. Use to be absolutely strong at work...now it's feeble on both networks. There are a dozen wifi networks in the neighborhood...It might see 3, then 1 then six then 10 seconds later 3 again...then none....it will see my Wifi A in saved networks...then it wont...then it will...if I click on it and hit "connect"...95% of the time it either instantly reverts to Saved...or it disappears completely. Sometimes it will connect sporadically to either WifiA or WifiB...then either hold it for 30 minutes or drop it five seconds later. Or it will like wifi B one day and absolutely refuse it the next day. Sometimes it will seem steady on a network but as soon as I go to use it or pass data, it will drop out. Absolutely frustrating that I am going to have to trash this phone due to this one issue.
I started off rooted on KK for past two years, everything fine for two years. Last week this started...no updates...still on KK 4.4.2....wiped and factory reset...on Lolipop....still the exact same issues. Makes me thing that something fried on the main CPU. When firmware updates do nothing...that says to me hardware...of course nobody from AT&T will acknowledge this although there are many posts online... and I'm off warranty- so my tough luck. Try again...$700 more dollars.
Some people have been struggling with the Wi-Fi connection on their LG G3 handset. In some cases they can't get it to connect, but more commonly it is connecting for a period and then dropping inexplicably and refusing to come back. You can try various things to sort it out.
1.Start by turning your router off and then on again.
2.Take your LG G3 battery out and then put it back in again and restart the phone.
3.Go to Settings > Wi-Fi and long press on your router and then tell it to Forget network and set the connection up fresh.
4.Make sure that the Battery saver isn't responsible by turning it off. If it is then you can head in and change the settings so it doesn't turn off Wi-Fi.
5.Try turning off Bluetooth if you have it on, sometimes it can interfere with Wi-Fi.
6.Tap the menu button at the top right of the Wi-Fi screen and access Advanced Wi-Fi. Try changing the settings in here.
7.If you have the option to connect to the 5GHz band instead of 2.4GHz, try it.
8.Install Wifi Analyzer and check how busy your channels are. Try switching to a less busy channel if that seems to be the problem.
9.Check with your ISP or router manufacturer to ensure that you have the latest firmware for your router.