CDMA technology explain
Janus Krarup MOT GSM programming
info page
GSM info World Wide
(Networks , Roaming , System)
Cellular Telephone
Basics
Forum for lot of cellular info (Include iDEN)
Cellular & PCS site guide
RadioPhone Cellular info
A huge Cellular Info Site (include iDEN)
DDI Software for Windows/Linux and Sound card
Wireless Aplication Protocol (WAP) info
This Place allow you to Send E-mail from Your GSM phone via SMS Message