MVNO

http://zh.wikipedia.org/wiki/%E5%8F%B0%E7%81%A3%E9%9B%BB%E4%BF%A1%E6%A5%AD%E8%80%85%E5%88%97%E8%A1%A8

http://en.wikipedia.org/wiki/Mobile_virtual_network_operator

A mobile virtual network operator (MVNO), or mobile other licensed operator (MOLO) is a wireless communications services provider that does not own the wireless network infrastructure over which the MVNO provides services to its customers.