To be clear, the xNT cannot act like an iClass HID chip. But, if the reader/system can read and use UIDs from “standard” ISO14443A chips, then the xNT and flexNT should work just fine. It will probably come down to configuring the system to accept “low security” UID serial numbers from ISO14443A chips, which is probably turned off by default… but if it’s saying it can use those chips then it should work just fine. I think the problem is, for most people who are not in control of the systems they try to interact with, they attempt to use the xNT with an HID iClass reader and it fails because the company has just gone with the default “high security” configuration, which only supports iClass chips from HID (even though these aren’t really all that secure).