Method for handling an emergency call, eCall, related, eCall-related voice call by a mobile communication network, wherein the mobile communication network comprises at least one circuit switched, CS, call, CS-call handling entity, wherein the CS-call handling entity receives the eCall-related voice call, especially from a vehicle, the eCall-related voice call comprising voice part data and in-band data information, wherein the CS-call handling entity comprises an eCall-gateway functionality and an Internet Protocol, IP, Multimedia Subsystem, IMS, interface, the IMS interface comprising a payload interface part and a signaling interface part, wherein upon an eCall-related voice call, incoming at the CS-call handling entity, the method comprises the following steps: -- in a first step, the eCall-related voice call is received by the CS-call handling entity, -- in a second step, the CS eCall emergency call type of the eCall-related voice call is detected, -- in a third step, subsequent to the second step, the in-band data information of the eCall-related voice call is extracted and decoded by the eCall-gateway functionality, -- in a fourth step, subsequent to the third step, the data of the eCall-related voice call are provided to the IMS interface, wherein the in-band data information is transported by the IMS interface towards an IMS network using the signaling interface part and the voice part data is transported by the IMS interface towards the IMS network using the payload interface part, wherein the incoming eCall-related voice call is terminated by the CS-call handling entity, and wherein the in-band data information extracted and decoded by the eCall-gateway functionality, is human readable clear text, wherein the in-band data information and the voice part data are transported by the IMS interface towards the IMS network as part of the same voice over IP session, wherein the in-band data information is transported as part of a Session Initiation Protocol, SIP, invite message and/or as part of a SIP info message, and according to a packet switched eCall standard, wherein the in-band data information is transported using a SIP signaling indication indicating that the originating eCall-related voice call is of a CS eCall emergency call type. -- in a first step, the eCall-related voice call is received by the CS-call handling entity, -- in a second step, the CS eCall emergency call type of the eCall-related voice call is detected, -- in a third step, subsequent to the second step, the in-band data information of the eCall-related voice call is extracted and decoded by the eCall-gateway functionality, -- in a fourth step, subsequent to the third step, the data of the eCall-related voice call are provided to the IMS interface, wherein the in-band data information is transported by the IMS interface towards an IMS network using the signaling interface part and the voice part data is transported by the IMS interface towards the IMS network using the payload interface part, wherein the incoming eCall-related voice call is terminated by the CS-call handling entity, and wherein the in-band data information extracted and decoded by the eCall-gateway functionality, is human readable clear text, wherein the in-band data information and the voice part data are transported by the IMS interface towards the IMS network as part of the same voice over IP session, wherein the in-band data information is transported as part of a Session Initiation Protocol, SIP, invite message and/or as part of a SIP info message, and according to a packet switched eCall standard, wherein the in-band data information is transported using a SIP signaling indication indicating that the originating eCall-related voice call is of a CS eCall emergency call type.