A first base station (BS) for handling a connection transfer with a second BS comprises a storage unit for storing instructions and a processing circuit coupled to the storage unit. The processing circuit is configured to execute the instructions stored in the storage unit. The instructions comprise determining to configure a first communication device to be in a light radio resource control (RRC) connected mode; generating a first RRC message configuring the first communication device to be in the light RRC connected mode; generating a first connection transfer message comprising first system information, when the first communication device is in coverage enhancement (CE) or a type of the first communication device is a first type; and generating the first connection transfer message comprising second system information, when the first communication device is not in CE or the type of the first communication device is a second type.