In one embodiment, a method is provided for managing secure registration of a mobile communications device, the method comprising registering, at a network node, the mobile communications device using a first registration process, the first registration process requiring an authentication key associated with the mobile communications device; processing a request from the mobile communications device, the request including an indication that the mobile communications device is changing to a second registration process; and clearing the authentication key associated with the mobile communications device upon expiration of a time window.