this post was submitted on 09 Sep 2024
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There is no standard what red USB A ports mean. Could be fast charging through some proprietary protocol or other special features. Or just a design choice.
USB ports with no symbol just don't advertise what they're capable of. Most phones support super speed data transfer. Basic USB-PD and display port output support is also common. They may also support other stuff, like pretending to be a webcam, audio output and much more. But you usually have to look in the manual or data sheet to know what is supported.