WISP (Wireless Internet Service Provider, Wireless Broadband Operator, Wireless Operator. Associated with WiMax, Wi-Fi.)
http://en.wikipedia.org/wiki/Wireless_broadband_operator

Wireless Service Providers - Entities that provide wireless services. Services can include cellular telephone service, personal communications services (PCS), or both.

Wireless Telecom Services - Voice, data/Internet, and video solutions for mobile, cellular and other types of wireless. These might use technologies such as 2.5G (e.i., EDGE, GPRS) CDMA, GSM and 3G (e.i., UMTS, W-CDMA) standards and protocols.