A method of operating a first mobile telecommunications device, the first mobile telecommunication device comprising a processor and memory, wherein the memory is configured to store at least one first application, the method comprising at the first mobile telecommunication device: - a) providing a configuration template for configuring one or more applications of a set of mobile telecommunication devices, the set of mobile telecommunication devices comprising the first mobile telecommunication device, the one or more application comprising the first application; - b) adapting the configuration template using at least one value of an operating condition parameter of the first mobile telecommunication device; - c) configuring the first application using the adapted configuration template; - d) receiving from a sender a change of at least one of the first application, the confguration template and the adapted configuration template; - e) classifying the received change into a first change, second and/or third change category, wherein the first, second and third change categories involve a change of at least the configuration template, of at least the adapted configuration template and of at least the first application respectively; - f) in case the received change is classified into the first change category sending a confirmation request of the change to an update authorization server that is in communication with the first mobile telecommunication device via a network, and receiving one of a confirmation and a rejection message of the change from the update authorization server; - g) in case the received change is classified into the second and/or third change categories o determining at least one component of the adapted configuration template and/or the first application that is affected by the change; o in response to determining that the component is not being currently changed and that the component is unlocked for a change that is classified into at least one of the second and third change categories, measuring a current value of the operating condition parameter; - h) applying the change in case of receiving the confirmation message or the received change matches the current value of the operating condition parameter. - a) providing a configuration template for configuring one or more applications of a set of mobile telecommunication devices, the set of mobile telecommunication devices comprising the first mobile telecommunication device, the one or more application comprising the first application; - b) adapting the configuration template using at least one value of an operating condition parameter of the first mobile telecommunication device; - c) configuring the first application using the adapted configuration template; - d) receiving from a sender a change of at least one of the first application, the confguration template and the adapted configuration template; - e) classifying the received change into a first change, second and/or third change category, wherein the first, second and third change categories involve a change of at least the configuration template, of at least the adapted configuration template and of at least the first application respectively; - f) in case the received change is classified into the first change category sending a confirmation request of the change to an update authorization server that is in communication with the first mobile telecommunication device via a network, and receiving one of a confirmation and a rejection message of the change from the update authorization server; - g) in case the received change is classified into the second and/or third change categories o determining at least one component of the adapted configuration template and/or the first application that is affected by the change; o in response to determining that the component is not being currently changed and that the component is unlocked for a change that is classified into at least one of the second and third change categories, measuring a current value of the operating condition parameter; o determining at least one component of the adapted configuration template and/or the first application that is affected by the change; o in response to determining that the component is not being currently changed and that the component is unlocked for a change that is classified into at least one of the second and third change categories, measuring a current value of the operating condition parameter; - h) applying the change in case of receiving the confirmation message or the received change matches the current value of the operating condition parameter.