Automatic communication mode selection in a cellular telecommunications network

A method and a network element in a cellular telecommunications network for improving network performance, the network including mobile terminals equipped with a plurality of receivers and operable to communicate with the network element in a MIMO mode or in a dual cell mode. The network element includes a decision making unit (1) arranged to determine, in dependence upon one or more input parameters, MIMO or dual cell mode; and to instruct the mobile terminal to make use of said determined mode. The working mode for the mobile terminal can be instructed at call set-up or during the call. The input parameters can be mobile terminal parameters or network parameters.