How to simultaneously use several 3g modems on 1 computer?

Question

proxy

There is a PC and 4 usb ports, one white ip. Is it possible to simultaneously run four 3g modems, having received 4 network devices (virtual) and each with a different ip? Is it possible then to make a proxy server out of all this, to which they will connect via white ip and there will be 4 different ports (for each network device)?
Or do I need to install a separate network card for each usb modem?

Answer 1

One Internet connection via two 3G modems
forum.oszone.net/thread-227043-2.html
felixd.mypage.ru/dva_3g.html
www.cyberforum.ru/wlan/thread691196.html
In short, where do you get a white IP if you use 3g modems?
How to set up 3 network interfaces on windows without default gateway conflict?