A wireless device receives a grant scheduling a transmission on sub-bands of a physical uplink shared channel of a cell. The sub-bands comprise a first sub-band and one or more other sub-bands. The wireless device performs, in response to the grant: a first type listen-before-talk (LBT) on the first sub-band; and a second type LBT on each of the one or more other sub-bands. Data is transmitted on a sub-band of the sub-bands, based on a determination that: the first type LBT indicates that the first sub-band is clear; and the second type LBT indicates that each of the one or more other sub-bands are clear.