A user equipment for alleviating barred access while reselecting from a first cell to a second cell in a mobile communication system is provided. A wireless module detects receives system information broadcasted in the first cell. A storage unit stores the system information. A controller reselects the user equipment from the first cell to the second cell. Particularly, the cell reselection is not performed during a connection establishment procedure. Also, the controller determines whether a first barred access timer is running in response to reselecting from the first cell to the second cell, and stops the first barred access timer and informs the upper layer of an RRC protocol that the access of the first service is allowed in response of that the first barred access timer is running.