Reset smartphone to factory settings without password - how?

I have received a smartphone of a deceased and no one has no password. The brand eats HUAWEI. What do I have to do to be able to use the smartphone again?

The same as with a stolen device.

There's a ne keyboard combination but that is different with newer models, so I do not know for sure. Normally, keep the key down and off when it is off and then you will come to a menu

For this you need the firmware, which you then have to flash the phone.

Greetings from Leipzig

P.S.: Unknown terms are all explained in the net.