Please visit the link below to get the latest Firmware for B9512G:
https://commerce.boschsecurity.com/au/en/B9512G-Control-Panels/p/13825787531/?goto=Downloads
Please visit the link below to get the latest Firmware for B8512G:
https://commerce.boschsecurity.com/au/en/B8512G-Control-Panels/p/13825824395/?goto=Downloads
And please follow the instructions on YouTube video to upgrade the Firmware for G Series:
https://www.youtube.com/watch?v=vNE5S5tvmqw