A method of handing over of a mobile terminal from a first network to a second network. The method includes initiating a handover decision in a base station, sending a handover request to a MME, mapping, in the MME, between active SAE Bearers and required PDP contexts, and sending a handover preparation request including target network specific QoS information from the MME to the second network. The method further includes sending a handover confirmation message that includes RAB success and failure information from the second network to the MME, and sending a handover command from the MME to the mobile terminal, wherein the handover command includes a 3G/2G RAB, a channel, an SEC, and PDP context information.