Here are some popular 50-inch 4K smart TVs that you can consider:
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Samsung TU7000: This 50-inch 4K smart TV from Samsung comes with a sleek design and features HDR support, Tizen operating system, and smart assistant compatibility.
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LG UM7300: This 50-inch 4K smart TV from LG comes with a slim design, features support for HDR content, and has an easy-to-use WebOS smart TV platform.
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Sony X750H: This 50-inch 4K smart TV from Sony features an attractive design, HDR support, and Android TV operating system that comes with Google Assistant.
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TCL 50S535: This 50-inch 4K smart TV from TCL has a sleek design, features support for Dolby Vision HDR, and comes with Roku TV operating system that offers access to a wide range of streaming apps and services.
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Power Guard PG50F4K: This 50-inch 4K smart TV from Power Guard comes with a stylish design, features support for HDR content, and Android TV operating system that comes with Google Assistant.
Please note that these are just some examples of popular 50-inch 4K smart TVs, and there are other models and brands available in the market as well. Before making a purchase, make sure to check the features and specifications of the TV to ensure it meets your requirements.