Thank you for asking! Cleaning your filters is the most important maintenance task for your AC to run effeciently. As a general rule, it is advised to clean at least once a month but depends on pollution in your area. Longer run times and dusty enviornment will block your filter very soon, in that case it is advised to clean it once in every 2 weeks.

Hello, Mr. Abdullah, Thank you for posting your question. Yes, our tv panels supports 4k vision and also you can easily connect your phone to your television as all our our smart tv's are powered with WebOS. To know more visit our download link and view our TV catalogue. https://www.hyundai-appliances.com/downloads