Yes, I had assumed such things in the past, too... ;-). But of course you are right in general: A smartphone, notebook or tablet manufactured will likely be bu

Yes, I had assumed such things in the past, too... ;-). But of course you are right in general: A smartphone, notebook or tablet manufactured will likely be built to stricter standards than a random cable from a random Amazon seller. Nevertheless, "works with a good notebook" is generally not a replacement for a proper acceptance test. -- Typically it will be in favor of the marginally failing component, as standards always employ some safety margins, and properly built hardware will be forgiving for "slightly broken" cables. Such a cable may as well, and rightfully, fail with any number of other perfectly standards compliant computers.