What are the necessary criteria for a firmware upgrade? The phone is paired with the camera and is connected. Battery has at least 25% capacity. The SD card has more than 20MB storage remaining. Related articles What should I do if a firmware upgrade fails? How do I upgrade my firmware? What should I do if the firmware update from the APP fails? How do I know my firmware version? How do I make sure my firmware is up to date? Comments 0 comments Please sign in to leave a comment.