A network comprising a first BS for handling a handover comprises at least one storage device for storing instructions and at least one processing circuit coupled to the at least one storage device. The at least one processing circuit is configured to execute the instructions stored in the at least one storage device. The instructions comprise the first BS receiving a Handover Request message from a second BS, wherein the Handover Request message comprises a first plurality of UE capabilities, and the first plurality of UE capabilities indicate a first maximum reception (RX) bandwidth (BW) (RX_BW) for a frequency band; the first BS obtaining a first RX_BW and a first location of the first RX_BW at a first carrier; the first BS generating a handover command configuring the first communication device; and the first BS transmitting a Handover Request Acknowledge message comprising the handover command, to the second BS.