Manufacturers of equipment for mainstream cellular networks. This includes GSM family (GSM, UMTS, HSPA, LTE), CDMA family (IS-95, EV-DO, cdmaOne), iDEN, NMT, PDC. It excludes wireless data standards such as 802.11 series.
This is for equipment manufacturers to the mobile phone network operators. Consumer equipment, services, installation etc should be directed to alternative categories.