Method of communication in a mobile network performed by an apparatus, the method comprising detecting whether or not a user equipment has completed a reconfiguration of a radio bearer based on a first reconfiguration message from the mobile network, wherein the first reconfiguration message provides a first configuration of a first radio bearer in a first cell; detecting whether or not a cell update message is received from the user equipment, wherein the cell update message indicates that the user equipment has performed a cell update from the first cell to a second cell different from the first cell; characterized by the method further comprising: deciding whether or not a first capability of the first cell and a second capability of the second cell are different; providing a cell update confirm message to the user equipment in response to the cell update message, wherein, based on the decision that the first capability and the second capability are different, a second configuration of a second radio bearer in the second cell is excluded from the cell update confirm message; receiving a completion message indicating that the cell update is completed; triggering, after receiving the completion message and based on the detections that the user equipment has not completed the reconfiguration of the first radio bearer in the first cell and the cell update message is received and the decision that the first capability and the second capability are different, providing a second reconfiguration message to the user equipment, wherein the second reconfiguration message provides the second configuration. detecting whether or not a user equipment has completed a reconfiguration of a radio bearer based on a first reconfiguration message from the mobile network, wherein the first reconfiguration message provides a first configuration of a first radio bearer in a first cell; detecting whether or not a cell update message is received from the user equipment, wherein the cell update message indicates that the user equipment has performed a cell update from the first cell to a second cell different from the first cell; characterized by the method further comprising: deciding whether or not a first capability of the first cell and a second capability of the second cell are different; providing a cell update confirm message to the user equipment in response to the cell update message, wherein, based on the decision that the first capability and the second capability are different, a second configuration of a second radio bearer in the second cell is excluded from the cell update confirm message; receiving a completion message indicating that the cell update is completed; triggering, after receiving the completion message and based on the detections that the user equipment has not completed the reconfiguration of the first radio bearer in the first cell and the cell update message is received and the decision that the first capability and the second capability are different, providing a second reconfiguration message to the user equipment, wherein the second reconfiguration message provides the second configuration. deciding whether or not a first capability of the first cell and a second capability of the second cell are different; providing a cell update confirm message to the user equipment in response to the cell update message, wherein, based on the decision that the first capability and the second capability are different, a second configuration of a second radio bearer in the second cell is excluded from the cell update confirm message; receiving a completion message indicating that the cell update is completed; triggering, after receiving the completion message and based on the detections that the user equipment has not completed the reconfiguration of the first radio bearer in the first cell and the cell update message is received and the decision that the first capability and the second capability are different, providing a second reconfiguration message to the user equipment, wherein the second reconfiguration message provides the second configuration.