Besides that thread I can highly suggest the Search Function 
Creating a 4G proxy using 4g sim card
How can I create my own 4G proxies?
https://mpsocial.com/search?q=Own%204G%20Proxy
So many results on Level 1 with people wanting to do the same. More or less successful.
if you only need 1 proxy things are simple, if you wanna do more I suggest getting to know what you are working with and earn Level 2 on the journey