This post would be straight to the point on how you can easily fix the net::ERR_PROXY_CONNECTION_FAIL error you might often get on your android device when you are trying to use applications that access the internet.
Now this error occurs as a result of your internet configuration trying to force the application in question to use a proxy server. To eliminate this, all you need do is eliminate the forced proxy tunneling.
How To Stop PROXY CONNECTION FAIL Android Error.
If you are making use of a Wi-Fi network, all you need do is
Go to Settings > WIFI, then select the particular network you are connected to, press and hold for some seconds and click on some sort of “Disable Proxy” and that’s it.
On the other hand, if you are making use of the internet configuration provided by your service provider (APN), simply go to Settings > Mobile Networks > Access Point Names . Now edit the Access Point Name in use and disable whatever proxy you find in it, then Save.
To be on the safe side, it is recommendable that you delete the Access Point Name and create a new APN profile without proxy server enforcement.
You can then try connecting the application back to the internet and watch the net::ERR_PROXY_CONNECTION_FAIL error get fixed.
I hope you find this little tip helpful. Feel free to share with your friends.