PHS 1.9GHz "AIR-EDGE" Mainstream services are emphasized. Brand names are "quoted." Some important notes: PDC (Personal Digital Cellular) is a TDMA-based 2G technology and deployed only in Japan. GSM is not deployed in Japan. N900iG, M1000 (based on Motorola A1000), NM850iG (based on Nokia 6630), N600i and L600i are the only FOMA phones that supports GSM as well. Other FOMA phones are FOMA(W-CDMA)