I also tried to print from my android phone using the brother supplied printing software.
The software finds the brother printer on the network via IP address and selects the correct model HL-4070CDW but when I attempt to print I get a cannot connect error.
It states to make sure the printer is on the same SSID which it is, it also states to make sure the printer is on, which it is, and it asks to check and make certain the WiFi access point/router's "Privacy Separator" option is Disabled which I have.
Still no printing.