Device and method of handling connection transfer

A second base station (BS) for handling a connection transfer with a first BS, comprising:

• a storage unit, for storing instructions of:
• connecting to the first BS;
• receiving a connection request message from a communication device;
• transmitting a connection transfer request message to the first BS in response to the connection request message;
• receiving a connection transfer message from the first BS, wherein the connection transfer message is transmitted by the first BS in response to the connection transfer request message, and the connection transfer message comprises a communication device configuration of the communication device and at least one of first system information and second system information;
• generating a connection response message comprising a first configuration generated according to the first system information, if the connection transfer message comprises the first system information and the communication device is in coverage enhancement (CE) or a type of the communication device is a first type;
• generating the connection response message comprising a second configuration generated according to the second system information, if the connection transfer message comprises the second system information and the communication device is not in CE or the type of the communication device is a second type;
• and
• transmitting the connection response message to the communication device in response to the connection request message;
• and
• a processing circuit, coupled to the storage unit, configured to execute the instructions stored in the storage unit.