Method for improving charging information accuracy in a telecommunications network with respect to a target user equipment, wherein the telecommunications network comprises a core network, a first base transceiver station and a second base transceiver station, wherein the target user equipment receives data traffic from the core network in the form of data packets, the data traffic being related to a data connection established between the target user equipment and the telecommunications network, wherein in case that the target user equipment camps on the telecommunications network using the first base transceiver station, the first base transceiver station comprises a first non-delivered packet data volume information, the first non-delivered packet data volume information counts the undelivered data packet volume from the first base transceiver station to the target user equipment, wherein in case that the target user equipment camps on the telecommunications network using the second base transceiver station, the second base transceiver station comprises a second non-delivered packet data volume information, the second non-delivered packet data volume information counts the undelivered data packet volume from the second base transceiver station to the target user equipment, wherein in case of a handover or cell change procedure from the first base transceiver station to the second base transceiver station regarding the target user equipment, the first non-delivered packet data volume information is transmitted from the first base transceiver station to the second base transceiver station and is taken into account for determining the second non-delivered packet data volume information, the first non-delivered packet data volume information being transmitted by means of using at least one out of the following: -- an X2 interface between the first base transceiver station and the second base transceiver station, wherein the first non-delivered packet data volume information is transmitted as part of a handover request message from the first base transceiver station to the second base transceiver station, -- an S1 interface between the first base transceiver station and the core network and the S1 interface between the core network and the second base transceiver station, -- a user equipment history information regarding the target user equipment, whereby the first non-delivered packet data volume information is transmitted to the second base transceiver station by adding the first non-delivered packet data volume information in the user equipment history information. -- an X2 interface between the first base transceiver station and the second base transceiver station, wherein the first non-delivered packet data volume information is transmitted as part of a handover request message from the first base transceiver station to the second base transceiver station, -- an S1 interface between the first base transceiver station and the core network and the S1 interface between the core network and the second base transceiver station, -- a user equipment history information regarding the target user equipment, whereby the first non-delivered packet data volume information is transmitted to the second base transceiver station by adding the first non-delivered packet data volume information in the user equipment history information.