Is there wi-fi on Paris public transit? I will be taking buses and subways and trains.
No, everyone uses their mobile phone service for internet. Most French plans cost as little as 20€ per month with unlimited data. Most of the parks have free Wifi.
Nope.
Trains yes, for the most part. If you watch train vlogs like I do they usually comment on the quality and quantity of the wifi, but in many cases they end up using their cellular since it's stronger and more reliable.
No, there is not WiFi on Paris public transit !!!