Device and method for handling user equipment configuration

A first base station (BS) for handling user equipment (UE) configuration, comprising:

• at least one storage device;
• and
• at least one processing circuit, coupled to the at least one storage device, wherein the at least one storage device stores, and the at least one processing circuit is configured to execute instructions of:
• transmitting a configuration to a communication device;
• communicating with the communication device according to the configuration;
• receiving a first message requesting changing the configuration, from the communication device;
• transmitting a Handover Request message to initiate a handover to a second BS, wherein the Handover Request message comprises information indicating that the communication device requests changing the configuration to the second BS when initiating the handover;
• receiving a Handover Request Acknowledge message for responding to the Handover Request message from the second BS, wherein the Handover Request Acknowledge message comprises a handover command;
• and
• transmitting the handover command to the communication device.