A method and apparatus for providing a data object from a Content Server to a client device over a Radio Access Network (RAN). A first property is determined that may affect the way in which the data object is to be transferred. A property of the data object is also determined. In response to the determined first property and the property of the data object, a characteristic of a transfer of the data object from the Content Server to the client device is amended. The data object is then provided from the Content Server to the client device. The method allows characteristics of the transfer of the data object to be changed to optimize transfer to the client device. Examples of the first property include properties in the RAN or client device instructions.