A wireless device receives (1502) configuration information indicating that the wireless device is to report identifier information for a cell. The configuration information identifies a first frequency. The wireless device acquires (1504) a first part of system information for the cell on the first frequency, using the configuration information. The wireless device determines (1506) that a second part of system information for the cell is not transmitted on the first frequency. The second part of system information for the cell is necessary for determining the identifier information. The wireless device receives (1508) the second part of system information, including the identifier information, on a second frequency and reports (1510) the identifier information for the cell to the wireless communications network.