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Hi John. We would need some clarification on what you consider as being a "regular HDMI cord". In terms of picture quality, there’s no difference between HDMI cables, they are digital so it's all or nothing. Cables are rated by speed, and there are only two certifications: The original HDMI 1.0 Standard cable, designed for the first HD transition, so 720p, 1080i support, which are very rare now. With the introduction of HDMI 1.3 the bandwidth was doubled from about 4.9 Gigabits per second to over 10 Gbps, and these cables are called ‘High Speed HDMI’ cables. Any cable that claims to be high speed must support the full bandwidth. HDMI 2.0 makes the signaling method more efficient, so with the old method, a High Speed HDMI cable could handle 10.2 Gbps; now it can handle 18 Gbps which means that existing High Speed HDMI cables, which should always be labeled as “High Speed,” both on the packaging and the cable itself, can handle 4K content at 60 frames per second. If you’re buying a new 4K TV and you already have a High Speed HDMI cable, then there’s no need to buy a new one. There are some HDMI cables out now that will upscale 1080p to 4K that may require a USB port to draw power from. 4K at up to 30fps has always been supported from back in 2009. As for using AV Adapter with your phone, you will need to inquire about the adapter from its manufacturer. MHL, also known as Mobile High-Definition Link, allows you to connect your smartphone to an HDTV to share video, music, photos and even games in high definition. Your phone would need to be an MHL compatible phone so you can check with the manufacturer about that...^IFV
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