A wireless device receives radio resource control message(s) from a base station indicating random access resources of an uplink bandwidth part of a cell, that comprise two-step random access resources and four-step random access resources. Determining that the two-step random access resources comprise contention-free two-step random access resources, the wireless device selects from among a two-step random access type and a four-step random access type, the two-step random access type. Based on the two-step random access type, a preamble is transmitted to the base station using the two-step random access resources.