![](http://www.emcu.eu/wp-content/uploads/2020/03/FastWeb_FritzBox7390_Huawei-B525s-23a_logo.png)
How to use two router for obtain a double connection to the Internet.
One connection is via standard copper twisted pair (Fritz Box 7390) and the
second connection is via wireless modem that use a SIM card (Huawei B525s-23a).
For more info see here.