A method of handling serving cell becoming barred status, a base station (BS) using the same, and an user equipment (UE) using the same are provided. A cell status is changed into barred status is determined, and a first signaling message comprising a cell information indicator is transmitted by the BS, wherein the cell information indicator is used for indicating whether to transmit a second signal message comprising cell re-selection related information. The first signal message comprising the cell information indicator is received by the UE. When the UE determines that the BS switches to the barred status, the UE determines whether to receive the second signal message comprising the cell re-selection related information according to the cell information indicator in the first signal message.
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