I have just set up my HH6 purchased from Ebay. I checked the hub info and found this:
BT Hub 6A
This I believe is a very old firware version. Should I update it, if so how and should I do a full factory reset first?
Answers in laymans terms please.
In very layman's terms, you can't update it manually. It will get updated automatically at some point by BT if you leave it connected to your broadband.
You will have to wait as long as it takes, there is NO manual method of updating the firmware, it will probably only be a few days though. Doubt if you will tell the difference in any case.
If hh6 is second hand then I would factory reset it before using it. Won't update firmware but will give clean start