How to use mobile data instead on wifi (while wifi is on) on Android Phone? I am looking to use Android phone as the proxy server, so I setup "Proxy Server" on my android phone -> Connected phone to Wifi -> Got local IP of phone -> Connecting to phone thru LAN (from my local computer) thru the proxy and its working BUT phone is using same WIFI connection to connect back to Internet.
So i got 2 questions:

1) Is there any way to force Android to use Mobile data to access internet which it still have WIFI on ?

2) I can not connect thru that proxy from Internet when i am using phones IP address . I am getting error "Connection refused", I did some research and looks like some ISP blocking some or most ports. How do deal / bypass that ?

Thank You Very Much
Any help greatly appreciated.
You are trying to connect to a local network from a public network.. 

Using WiFi allows the local connection as you've mentioned but using Internet is different because it is not a device on the same WiFi network ( local )

To connect to a public ip, the device should have a server... Try looking into making a simple http server for either the PC or Phone.