A system and method for accessing a data network telephony account using a wireless personal information device (PID). The user may connect over the wireless cellular infrastructure to a telephony control server via a data network for access to the user's telephony account, which indicates the user's...http://www.google.co.uk/patents/US7016675?utm_source=gb-gplus-sharePatent US7016675 - System and method for controlling telephone service using a wireless personal information device
