Cloud services combine IT service provisioning capabilities with Network connectivity. A Cloud business has many advantages for Operators because they already possess the necessary tangible assets of IT and network capabilities, plus many relevant intangible assets such as a track record of trusted service, a large local customer base of SME with whom they are regularly in contact. Most importantly, they have the trust of their customers – nearly all customers view Operators as reliable, safe and secure enough to entrust them with valuable data.
For detail read this article it will help http://www.ericsson.com/res/site_AU/docs/2012/ericsson_telecom_cloud_discussion_paper.pdf