It seems that the Samsung GALAXY S 4 now uses a BCM2079x NFC controller instead of the NXP PN544 NFC controller, making it incompatible with the original Samsung TecTiles. The current TecTiles are MIFARE Classic 1k tags, which are unreadable by the BCM2079x controller, meaning that those of you who plan on getting a GALAXY S 4 and want to use TecTiles will have to replace your current tags with Samsung's upcoming TecTile 2 tags.
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