The Kindle Fire HD 8.9″ 4G (2nd Generation) tablet includes a bundled mobile network plan. This plan has a monthly quota of 250 MB of transferred data and a limit of 50 MB for any single data transfer. Because of the single-transfer limit, your app should never attempt to download a file larger than 50 MB over the mobile network.
https://www.developer.amazon.com/docs/fire-tablets/ft-data-transfers-and-mobile-networks.html

