The invention relates to a method for initiating an OTA session in a mobile radio communication network at the request of a user of a mobile terminal. The OTA session is established between the mobile terminal and a remote OTA server, the mobile terminal including a security element such as a UICC card. According to the invention, the method comprises: i) entering a special code using the man/machine interface of said mobile terminal; ii) said security element intercepting said special code; and iii) opening said OTA session between said mobile terminal and said remote server in a secure mode.