I have an associate who is trying to answer the question (in a report)  about how much bandwidth and throughput does a cellphone consume when the user is downloading data to his cellphone.  He does not specify across what medium  (LAN or WAN or WLAN) so I am going to assume this is in the realm of backhaul circuits. Any docs or links would also be helpful.   If I can clarify his question in any way, please let me know...thx in advance.