A wireless device receives, from a first base station associated with a master cell group (MCG) comprising a primary cell (PCell), a radio resource control (RRC) message comprising secondary cell group, SCG, configuration parameters of a primary SCG cell, PSCell, of a second base station. Based on the PCell failing after receiving the SCG configuration parameters and before the SCG configuration parameters of the PSCell are applied, the wireless device performs a cell selection. In response to the selected cell being the PSCell, the wireless device synchronizes with the PSCell based on the SCG configuration parameters.