There are three mobile phone technologies supported by the major networks within Japan:
- PDC (Personal Digital Cellular),
- CDMA (Code Divisional Multiple Access) and
- W-CDMA (UMTS).
Docomo, VodafoneJPN (Sofbank from october 2006) and Tuka support PDC for 2G network.
Docomo and VodafoneJPN have also introduced the newer W-CDMA (UMTS 3G phone).
Au by KDDI supports CDMA for 2G moble phone, and CDMA 2000 1X for 3G mobile phone.
PDC, CDMA, W-CDMA, CDMA-2000-1X are incompatible with each other and they are incompatible with GMS.
Guide created: 05/20/06 (updated 07/10/08)
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