The Visible base plan has no cap but and is unlimited but it is deprioritized though so depending on traffic/congestion your speeds will be affected. The plus plan offers 50GB of priority data on 4G LTE and 5G, after the 50GB is used you then become deprioritized like the base plan, but if you are in an area that has 5G UW with a phone that gets it that does not count towards the 50GB allotment.
