How to use a android phone as a 4G Proxy via RJ45?

Hi,

I got an own 4G proxy running via an android phone. I activated an hotspot and setup an TP-Link Router in client mode to connect to it.

I plugged in the TP-Link router on my firewall as a WAN interface, and it works great.

I am looking for a solution to get rid of the hotspot and the TP Link Router and connect the phone directly to my firewall via an ethernet adapter.

Ist that possible somehow?

Is it more secure to use a phone as an 4G modem than a simple 4G Router, or does it make no difference?

I'm am using Jarvee to push my instagram business.


Thank you!

why the use of tp link router and the firewall?
Can't u just connect directly to the mobile hotspot to get access to 4g internet? so that you get a 4g proxy as rotating proxy

Sorry, Im a noob for this, but I need to understand how to properly set a 4g proxy up with a mobile phone.