A wireless device receives a grant indicating radio resources for transmission of a transport block via a first cell. The radio resources overlap in time with a configured transmission of a preamble via a second cell. a transmission power of one of the preamble or the transport block is adjusted based on a power priority of the preamble. The power priority of the preamble is: higher than a power priority of the transport block based on the second cell being a primary cell; and lower than the power priority of the transport block based on the second cell being a secondary cell. The transport block is transmitted via the radio resources.