A method performed by a network node for selecting a communication mode in a wireless communications network, the method comprising obtaining information about a first and a second wireless device (121, 122) in the wireless communications network indicating that the first and the second wireless device (121, 122) are capable of communicating using any one of a set of at least three communication modes comprising at least a cellular communication mode, a Device-to-Device, D2D, half-duplex communication mode, and a D2D full-duplex communication mode; selecting, from the set of at least three communication modes, the D2D full-duplex communication mode as the communication mode for the communication between the first and second wireless devices (121, 122) when: at least one criterion on the capability of the first and second wireless device associated with the D2D full-duplex communication mode is met, and wherein the capability of the first and second wireless device associated with the D2D full-duplex communication mode is a path loss or signal strength value for a D2D communication between the first and second wireless device (121, 122), and wherein one of the at least one criterion on the capability of the first and second wireless device is met when the path loss or signal strength value is above a determined threshold value, and when at least one criterion on the operational capability of the network node associated with the D2D FD communication mode is met, wherein the operational capability of the network node associated with the D2D FD communication mode is a number of carrier frequencies available for D2D communication, and wherein one of the at least one criterion on the operational capability of the network node is met when the number of carrier frequencies available for D2D communication is above a determined threshold value; and transmitting information about the selected communication mode for the communication between the first and second wireless devices (121, 122) to at least one of the first and second wireless devices (121, 122). obtaining information about a first and a second wireless device (121, 122) in the wireless communications network indicating that the first and the second wireless device (121, 122) are capable of communicating using any one of a set of at least three communication modes comprising at least a cellular communication mode, a Device-to-Device, D2D, half-duplex communication mode, and a D2D full-duplex communication mode; selecting, from the set of at least three communication modes, the D2D full-duplex communication mode as the communication mode for the communication between the first and second wireless devices (121, 122) when: at least one criterion on the capability of the first and second wireless device associated with the D2D full-duplex communication mode is met, and wherein the capability of the first and second wireless device associated with the D2D full-duplex communication mode is a path loss or signal strength value for a D2D communication between the first and second wireless device (121, 122), and wherein one of the at least one criterion on the capability of the first and second wireless device is met when the path loss or signal strength value is above a determined threshold value, and when at least one criterion on the operational capability of the network node associated with the D2D FD communication mode is met, wherein the operational capability of the network node associated with the D2D FD communication mode is a number of carrier frequencies available for D2D communication, and wherein one of the at least one criterion on the operational capability of the network node is met when the number of carrier frequencies available for D2D communication is above a determined threshold value; and at least one criterion on the capability of the first and second wireless device associated with the D2D full-duplex communication mode is met, and wherein the capability of the first and second wireless device associated with the D2D full-duplex communication mode is a path loss or signal strength value for a D2D communication between the first and second wireless device (121, 122), and wherein one of the at least one criterion on the capability of the first and second wireless device is met when the path loss or signal strength value is above a determined threshold value, and when at least one criterion on the operational capability of the network node associated with the D2D FD communication mode is met, wherein the operational capability of the network node associated with the D2D FD communication mode is a number of carrier frequencies available for D2D communication, and wherein one of the at least one criterion on the operational capability of the network node is met when the number of carrier frequencies available for D2D communication is above a determined threshold value; and transmitting information about the selected communication mode for the communication between the first and second wireless devices (121, 122) to at least one of the first and second wireless devices (121, 122).