21st Century Technologies
http://www.21ctl.com/voice.htm
Intercellular Nigeria Plc
http://www.intercellular-ng.com
Monarch Communications Limited
http://www.monarchng.com
Multilinks Nigeria
http://www.multilinks.com
MTS First Wireless
http://www.mtsfirst.com
Prestel Telecoms
http://www.prestelnig.com
Rainbownet Limited
http://www.rbow.net
STARCOMMS Plc
http://www.starcomms.com
Visaphone Nigeria
http://www.visafone.com.ng
Zoom Mobile
http://www.reltel.org