A wireless device receives configuration parameters of cells grouped into physical uplink control channel (PUCCH) groups comprising: a primary PUCCH group comprising a primary cell and a secondary cell; and a secondary PUCCH group comprising a PUCCH secondary cell with a secondary PUCCH. A first indication to activate the secondary cell is received during a first subframe. Transmission of channel state information of the secondary cell from a second subframe that is eight subframes after the first subframe is started. A second indication for activation of the PUCCH secondary cell is received during a third subframe. Transmission of channel state information for the PUCCH secondary cell is started from a fourth subframe that is a number of subframes after the third subframe. The number is based on when the wireless device successfully detects the PUCCH secondary cell.