Prompt Multi-Wan (wan + 4g) router?

Question

Yota

Good afternoon.
Task such: At office reservation of the Internet is necessary. Because pulling a second provider is expensive, because he needs to pay monthly, and you only need to use it if the main one falls off - then it was decided to use a 4G provider (in particular Yota).
I would like to put a router at the entrance, which has the ability to switch between uplinks (multi-wan).
Now I'm looking towards Zyxel Keenetic.
Share your experience - can it automatically connect when the signal is lost (at the IP level) on the WAN port to the 4G modem inserted into it? Or do I need to go to the admin panel and switch? It is also desirable to reverse functionality ... as soon as the uplink on the wan port has risen, switch to it.
Can be will advise still what piece of iron with such opportunities?
Thank you.

Answer 1

Any DD-WRT/OpenWRT capable router with a USB port. These firmwares have the functionality you need.

Answer 2

look towards Mikrotik with SIM connectors (there are some) or with banal usb.
also here is possibly an interesting topic for you habrahabr.ru/qa/9752/

Answer 3

Recently, there are more and more references to the tomato firmware: a Chinese firmware translated by our enthusiasts. It does not contain anything superfluous, it is fast, in certain builds it is sharpened for a multivan.