A:AnswerHi,
The U8000F does not have built-in Alexa, but it does work with Alexa-enabled devices. You can ask your Alexa device to turn off your TV, change channels, control the volume, and more.
~Samsung Advisor
A:AnswerHi Bebe,
The U8000F TV is backed with a limited 1-year Manufacturer’s Warranty when purchased brand-new from an authorized dealer. You can enter the model number to review the full warranty details here: https://www.samsung.com/us/support/legal/LGL10000312/#standard-limited-warranty
~ Samsung Advisor