Method for reconfiguring data bearer and user device

The invention discloses a method executed by a user device. The method of the invention comprises steps of receiving a wireless resource control connection reconfiguration message; determining whether the received wireless resource control connection reconfiguration message comprises indicating information or not, wherein the indicating information indicates a user device to reconfigure a first type data bearer as a second type data bearer different from the first type data bearer; and if the received wireless resource control connection reconfiguration message comprises the indicating information, reconfiguring the user device according to the wireless resource control connection reconfiguration message, wherein the first type data bearer comprises a main cell group (MCG) data bearer or a wireless local area network (WLAN) separated data bearer, and the second type data bearer comprises the MCG data bearer, the WLAN separated data bearer or a WLAN inseparable data bearer. The invention also provides a corresponding user device.