A method for providing services in a telecommunication network with the use of USSD channel, comprising of a step of receiving (102), by a terminal device (DT), a call establishment request for a voice connection from an initiating terminal with a recipient's telephone number,—a step of rejecting (108) the call establishment request for the voice connection, if the call establishment request is determined (104, 106) to be a request for USSD based services. In subsequent steps information about the rejected call request is transmitted (110) from the terminal device (DT) to a server (GTW), the information including at least the telephone number of the terminal (OT) initiating the voice connection, and in the following steps the server (GTW) establishes (112) a USSD session and initiates (114) an exchange of messages from the server (GTW) via the USSD channel.