How to deploy a proxy server on an Android tablet?

Question

Android

Good afternoon!
Available:
1. A computer connected via a wired network to a modem
2. A Zyxel Keenetik Lite III modem connected to a wired Internet
3. An Android 4.4 tablet with a SIM card
Tell me if it is possible to make it possible to access the Internet not only through a standard wired Internet, but also using a proxy, through an Android tablet, connected respectively via wifi to the ZYXEL modem
THANKS

Answer 1

You won’t be able to go out at the same time, but in turn - turn on the access point on the tablet, and on the WISP züksel, so that you can take the Internet from the tablet’s AP.

Answer 2

I understand you need a backup channel through the tablet's mobile network. Let's first in theory - yes you can, implementation:
- make a double WAN on Zuksel with Policy Base Routing or just a backup channel through a tablet;
- use the tablet as an access point, and switch the router to client mode.
In practice:
- I don't know if this scheme can be implemented on Zuksel, if there is such a functionality, i.e. you need to change it, for example, to Mikrotik or flash it to OpenWRT;