Telecommunications services, namely, providing voice, text, graphics and other data communications via a global computer network and other networks; providing wireless access to the Internet or local network to access telephony services, namely, service activation, case management, service pricing and billing information, voice message management; for personal information management, namely, access to address book, calendar, to-do list and notes; the retrieval and delivery of news and general information from the Internet or local network; providing access to mobile telephones via a personal computer; over-the-air provisioning and management of hand-held devices; over-the-air synchronization of contact, calendar, task list and other information between a personal computer and a hand-held device