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Why is my WiFi not turning on

My WiFi just says turning on whenever it try to turn it on. Factory reset didn't do anything

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I have tha same issue... I found this guide online: https://forum.xda-developers.com/general...

Im from the philippines, is there anyway can my lg g3 be fix? my wifi is not functioning well it is not connecting even it says connecting to wifi, sometimes it connects to the wifi but it will drop after a few seconds.

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I have the same problem with my LG G3. I think it has to do with a failed battery. I ordered a replacement online but does not seem to be a new, genuine product so not a full fix. I find that the WiFi comes on, if I switch on the phone without a SIM card suggesting that both batteries are just not delivering enough juice to run both antennae.

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that sounds legit, it could also be a digital thing, even though, i tried Marshmallow, they say it's android 5.0, but that's hard to believe

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So after looking around the web i think this problem occurs when the phone's tendency to overheat messes up somthing in th wifi ic chip. Now i don't know the full break down of the phone's hardware but I have seen some fixes which involve putting a small bit of thermal pad on the wifi ic chip. I havent tried it yet on my broken phone but im pretty confident it'll fix the problem.

Tldr: Thermal pad placed on you wifi ic chip could help.

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Update I did attempt a ghetto style fix by just inserting a credit card to increase the preassure between the wifi ic chip and the the main board. And although the meathod worked it only did for a short time. I'm pretty certain that the solder connections reheated and reflowed on its own for a time but nothing short of remoing the old solder and adding new solder in its placewould work. Although I still highly encourage you to use the thermal pad/thermal paste in conjunction with a good resoldering job to properly fix the component.

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