I'm attempting to read an H4100 RFID tag using a Red Bee reader and am not having any luck. I have no problem reading the tags that came with the Red Bee, but it will not read mine. I believe they are within the same frequency range (125 kHz to 134.2 kHz). Regardless, I would think the Red Bee would be able to demodulate the signal because the data rate is a multiple of the carrier frequency (RFID tag is passive and uses incoming RF signal as a clock). The Red Bee uses an EM4095 transceiver IC for receiving AM signals. I am observing the DEMOD_OUT pin and can see the information change when the tag is put within proximity of the reader, but the data is incoherent (varying bit widths, not repeatable, etc.). I suppose the tag could be bad.
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