I want to know with me being a GEN 4 customer i know my internet is unlimited according to the Fair Access Policy.
Not "unlimited." You have a monthly limit.
I am wondering how slow are the speeds roughly when the data is used up.
About double the speed of a dial-up connection, or around 100 Kbps.
About how long would it take for just say 1 GB of data to download.
At full-speed, about 30 minutes to 1 hour. At dial-up, well, it will take a while. Hopefully, Steve "BirdDog" will chime in here. I could not find the link to a data download calculator he posted here recently.