During the whole process, MNO manages the cloud environment and it is the only party that has full access and permission to manage confidential data which is stored in the cloud.
Since MNO is the owner of the cloud, it fully manages the SIM in terms of monitoring the GSM network and controlling
cloud's data. The key assumption of this framework which makes the whole process logical in terms of its protocol design is the trusted relationship between the vendor and MNO.