BlackBerry PIN is an eight character hexadecimal identification number assigned to each BlackBerry device. PINs cannot be changed manually on the device (though BlackBerry technicians are able to reset or update a PIN server-side), and are locked to each specific BlackBerry. BlackBerry devices can message each other using the PIN directly or by using the BlackBerry Messenger application. BlackBerry PINs are tracked by BlackBerry Enterprise Servers and the BlackBerry Internet Service and are used to direct messages to a BlackBerry device. Emails and any other messages, such as those from the BlackBerry Push Service, are typically directed to a BlackBerry device's PIN. The message can then be routed by a RIM Network Operations Center, and sent to a carrier, which will deliver the message the last mile to the device. In September 2012 RIM announced that the BlackBerry PIN would be replaced by users' BlackBerry ID starting in 2013 with the launch of the BlackBerry 10 platform.