A system enabling envelope tracking, ET, for single-band or multi-band transmissions, comprising: two or more power amplification components (110 1, 110 2), each power amplification component being associated to a distinct frequency band wherein each of the two or more power amplification components (110 1, 110 2) comprises: a first power amplifier (112 1,1, 112 2,1) configured to operate according to an envelope tracking mode of operation and a second power amplifier (112 1,2, 112 2,2) configured to operate according to an average power tracking mode of operation; wherein the first power amplifiers (112 1,1, 112 2,1) and the second power amplifiers (112 1,2, 112 2,2) are configured to transmit in the frequency band associated with the respective power amplification component (110 1, 110 2) to which the respective power amplifiers (112 1,1, 112 2,1, 112 1,2, 112 2,2) belong; a first DC-to-DC converter (120 1) configured to provide a first supply voltage according to the envelope tracking mode and coupled to the first power amplifiers (112 1,1, 112 2,1) of each power amplification component (110 1, 110 2); a second DC-to-DC converter (120 2) configured to provide a second supply voltage according to the average power tracking mode and coupled to the second power amplifiers (112 1,2, 112 2,2) of each power amplification component (110 1, 110 2); and a control component configured to determine a present transmission mode and to select, based at least in part on the present transmission mode, one or more power amplifiers (112 1,1, 112 2,1, 112 1,2, 112 2,2) of the two or more power amplification components (110 1, 110 2), wherein the control component selects at most one of the first power amplifiers (112 1,1, 112 2,1) of the power amplification components (110 1, 110 2) and at most one of the second power amplifiers (112 1,2, 112 2,2) of the power amplification components (110 1, 110 2). two or more power amplification components (110 1, 110 2), each power amplification component being associated to a distinct frequency band wherein each of the two or more power amplification components (110 1, 110 2) comprises: a first power amplifier (112 1,1, 112 2,1) configured to operate according to an envelope tracking mode of operation and a second power amplifier (112 1,2, 112 2,2) configured to operate according to an average power tracking mode of operation; wherein the first power amplifiers (112 1,1, 112 2,1) and the second power amplifiers (112 1,2, 112 2,2) are configured to transmit in the frequency band associated with the respective power amplification component (110 1, 110 2) to which the respective power amplifiers (112 1,1, 112 2,1, 112 1,2, 112 2,2) belong; a first power amplifier (112 1,1, 112 2,1) configured to operate according to an envelope tracking mode of operation and a second power amplifier (112 1,2, 112 2,2) configured to operate according to an average power tracking mode of operation; wherein the first power amplifiers (112 1,1, 112 2,1) and the second power amplifiers (112 1,2, 112 2,2) are configured to transmit in the frequency band associated with the respective power amplification component (110 1, 110 2) to which the respective power amplifiers (112 1,1, 112 2,1, 112 1,2, 112 2,2) belong; a first DC-to-DC converter (120 1) configured to provide a first supply voltage according to the envelope tracking mode and coupled to the first power amplifiers (112 1,1, 112 2,1) of each power amplification component (110 1, 110 2); a second DC-to-DC converter (120 2) configured to provide a second supply voltage according to the average power tracking mode and coupled to the second power amplifiers (112 1,2, 112 2,2) of each power amplification component (110 1, 110 2); and a control component configured to determine a present transmission mode and to select, based at least in part on the present transmission mode, one or more power amplifiers (112 1,1, 112 2,1, 112 1,2, 112 2,2) of the two or more power amplification components (110 1, 110 2), wherein the control component selects at most one of the first power amplifiers (112 1,1, 112 2,1) of the power amplification components (110 1, 110 2) and at most one of the second power amplifiers (112 1,2, 112 2,2) of the power amplification components (110 1, 110 2).