Live view battery doorbell 2k


I recently bought a doorbell 2k battery. Indoor via WiFi the connection to live view is good and fast but through 4g/5g is almost impossible to check live view. I changed quality to low already. And from DHCP I give it a static IP. Reset it already.

Distance between chime, doorbell and router is 1M
I have at home fiber internet with 100 up/down.

What can I do?