Amazon Fire TV is an excellent tool for streaming content online. Even after being so reliable and handy , there is a major issue with it, i.e., many users are unable to watch 4k content on it. If you are one of those users , you can get in touch with Amazon customer care number. The customer service is available 24/7 , you can call them anytime you want. They will help you conquer this problem with their technical guidance, and you will soon be able to watch the 4k content.