Abstract: A system, apparatus, and method are directed to managing automatic sign in to an Instant Messaging (IM) session on mobile device from another computing device, such as a personal computer (PC), over a network. The end-user of the PC may provide an account identifier, password, and the like, and in response, receive a cookie, that may further include the account identifier, encoded string, and the like. The end-user may then request initiation of the IM session using a toolbar selection, a script, applet, form, web page selection, and the like. As part of the request, the cookie may be provided to the server. If the request is authenticated based, in part, on the cookie information, the server uses the account identifier to locate an associated a mobile device identifier. The mobile device identifier is employed to log the end-user automatically into the mobile device.

Abstract: Systems and methods allowing an instant messaging user to exchange messages with an e-mail user. To the instant messaging user, the experience is a seamless exchange of instant messages; to the e-mail user, the experience is a seamless exchange of e-mail messages. Conversion of an instant message to an e-mail message includes insertion of a token into the e-mail message, and conversion of an e-mail message to an instant message includes validating a token extracted from the e-mail message.

Abstract: A system, apparatus, and method is directed towards managing a quick registration of a mobile device over a network. The quick registration is directed at enabling an end-user to conveniently register a mobile device to be useable for such communications sessions, as an instant messaging (IM) session, and the like. The invention employs a pre-determined extension to a short code that instructs a server to register the mobile device sending the message. The message includes an account identifier along with a password to the account. The message may be a single message line, thereby providing a quick and convenient mechanism for registering the mobile device. The server receives the message along with a mobile device identifier, and stores a mapping relationship between the account identifier and the mobile device identifier after validating the password. In one embodiment, the message includes a command that the mobile device also be logged into an IM session.