RC connection setup includes a configuration that ensures that (1) UE capabilities can be queried if necessary, (2) further reconfigurations can be done, and (3) information usable for scheduling (e.g. CQI) can be provided. This enables the network to perform the so-called "first RRC reconfiguration" that finally initiates the UP communication using the desired bandwidth based on the UE capabilities. Once the UP configuration is ready and the UE is configured according to its capa- bilities, the connection establishment is fully completed, and data transmissions in the uplink and downlink can proceed. The connection setup conceals one hidden aspect that is not readily apparent: the BWP usage. Since the MIB is sent using semi-fixed resources, and reception of the MIB then tells the UE how to receive SIB1, which then allows the UE to perform initial access and receive the rest of the SI. However, to simplify the initial access, the UE only utilizes a downlink bandwidth equal to the MIB bandwidth in the initial access, which means it does not utilize the so-called initial DL BWP during the initial access. Only once the RRC connection setup is received by the UE will it start using the initial DL BWP (or another BWP configured by the network in the initial RRC configuration sent in the connection setup message). However, since the network does not know the exact UE capabilities at this stage yet (see Section 7.7.6.3), the initial configuration has to be such that any UE can utilize it, and since the UE bases its cell suitability criterion only on the initial (DL) BWP bandwidth, the network may not have much choice but to use the initial BWP in the initial RRC connection establishment. 7.7.5.3 Mobility and Measurements in Connected Mode Mobility procedures in the connected mode can be divided to two basic tasks: the cell change procedures (which are typically called "handovers") and measurements (which are mostly performed by UEs and reported to the network). Mobility is fully controlled by the network in the connecte