Android phone as 4g proxy server

I am trying to turn my old phone (xiaomi mi5) into a 4g proxy server which i can use with different apps. for scraping data etc. I have been searching how to setup and i found some articles but they are not very clear. I am really a newbie and i have no idea how to set it up. I have bought 2 android apps Proxy Server pro and Servers Ultimate pro having trouble configuring it. These are the steps i have followed:

Servers Ultimate pro
-add a proxy server
in general tab i didnĀ“t touch anything

-rules tab and added a new rule HOST CONTAINS: i put my public ip address which i found at

now when i try to test it i got no connection.