It is not enough Amazon Prime(Android TV app) takes a lot of data.But if you buy fire TV Stick or if the Tv, Android Box has data saver option than you can Save the Data.I use mobile hotspot to watch on Amazon Prime as my Mi TV has data saver for Mobile hotspot.I also own a JioFi and a lot of data is used on Prime Video.The main Problem is that there are no Video Quality Settings in Prime Video app.It gets auto set as per netspeed,Here is where the Video gets set to FHD and we can't to anything about It.