Method for transmitting and/or for using a profile information or at least parts thereof, the profile information being transmitted from a server entity to a client communication device and the profile information being used in or by an embedded subscriber identity module of the client communication device, wherein, by means of using the profile information, the client communication device is enabled to operationally communicate with a mobile communication network, wherein the client communication device and/or the embedded subscriber identity module of the client communication device comprises or is assigned to an identifier information that is specific to that specific client communication device or to that specific embedded subscriber identity module, wherein the mobile communication network and/or the server entity comprises or is assigned to or is able to access a profile database and/or a profile generator, wherein the profile database comprises the profile information associated or assigned to the identifier information and/or wherein the profile generator generates the profile information associated or assigned to the identifier information, wherein the method comprises the following steps: -- in a first step, the client communication device is temporarily connected to the server entity, wherein a lightweight machine-to-machine, communication interface is established between the client communication device and the server entity, -- in a second step, the profile information is transmitted from the server entity to the client communication device, using the lightweight machine-to-machine communication interface, wherein the profile information is taken in encrypted form from the database dependent on the identifier information of the client communication device and/or of the embedded subscriber identity module, or the profile information is encrypted dependent on the identifier information of the client communication device and/or of the embedded subscriber identity module and the encryption key is taken from public key information, previously received from the client communication device and/or from the embedded subscriber identity module. wherein the profile database comprises the profile information associated or assigned to the identifier information and/or wherein the profile generator generates the profile information associated or assigned to the identifier information, wherein the method comprises the following steps: -- in a first step, the client communication device is temporarily connected to the server entity, wherein a lightweight machine-to-machine, communication interface is established between the client communication device and the server entity, -- in a second step, the profile information is transmitted from the server entity to the client communication device, using the lightweight machine-to-machine communication interface, -- in a first step, the client communication device is temporarily connected to the server entity, wherein a lightweight machine-to-machine, communication interface is established between the client communication device and the server entity, -- in a second step, the profile information is transmitted from the server entity to the client communication device, using the lightweight machine-to-machine communication interface, wherein the profile information is taken in encrypted form from the database dependent on the identifier information of the client communication device and/or of the embedded subscriber identity module, or the profile information is encrypted dependent on the identifier information of the client communication device and/or of the embedded subscriber identity module and the encryption key is taken from public key information, previously received from the client communication device and/or from the embedded subscriber identity module.