American freak offers kits for implanting a RFID chip under the skin
Thoughtfully google on RFID, stumbled upon a man named Amal, who offers kits for implantation under the skin of an RFID chip, the standard EM-Marin, operating at a frequency of 125kHz or the standard NFC (13.56MHz), which can be read and written from smartphones that support This technology - Samsung Nexus S, Samsung Galaxy Nexus, Nexus 7, HTC Amaze. Most access cards and wireless keys for intercoms work according to the EM-Marin 125kHz standard. Chip size and implantation site:
Charms, familiar to every user of intercoms. EM-Marin 125kHz standard.