A method of configuring user equipment, the user equipment being for use in a cellular wireless telecommunications network, the user equipment comprising a configuration database and a configuration manager adapted to modify the configuration database, and the user equipment further comprising a communications unit (407, 413) and an application manager; the method comprising the provision by the user equipment manufacturer of a predetermined first process format transformation algorithm to enable configuration by a first process; the method including the first process comprising: receiving, over the cellular wireless telecommunications network, a first process configuration message comprising configuration data, transforming the configuration data in the first process configuration message for use by the configuration manager using the first process format transformation algorithm, and the configuration manager modifying the configuration database in accordance with the configuration data; the method also including a second process comprising: the communications unit (407, 413) receiving a configuration package comprising a user agent for installation on the user equipment from a network node, and also comprising a second process configuration message comprising configuration data to be transformed using the application; the application manager processing the configuration package to extract the user agent from the configuration package and to install the user agent as an application on the user equipment; using the user agent to transform the configuration data received in the second process configuration message for use by the configuration manager using a second process format transformation algorithm different from the first process format transformation algorithm; and the configuration manager modifying the configuration database in accordance with the configuration data of the second process configuration message. receiving, over the cellular wireless telecommunications network, a first process configuration message comprising configuration data, transforming the configuration data in the first process configuration message for use by the configuration manager using the first process format transformation algorithm, and the configuration manager modifying the configuration database in accordance with the configuration data; the communications unit (407, 413) receiving a configuration package comprising a user agent for installation on the user equipment from a network node, and also comprising a second process configuration message comprising configuration data to be transformed using the application; the application manager processing the configuration package to extract the user agent from the configuration package and to install the user agent as an application on the user equipment; using the user agent to transform the configuration data received in the second process configuration message for use by the configuration manager using a second process format transformation algorithm different from the first process format transformation algorithm; and the configuration manager modifying the configuration database in accordance with the configuration data of the second process configuration message.