Well it depends on which chip you got. It was working with NFC phones in the past? If so then you got an xNT. The xEM is not able to be read by any NFC devices. The S6 is terrible… it won’t read well at all with that. I’ve not heard of any of the other phones. The iPhone X can work well if the tag is positioned well, but you need an app to read. I suggest TagInfo from NXP. The tag should be placed right on the top of the phone, like your phone is standing up on it’s head over the tag.
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