Kenyan mobile-phone users are hoping the entry of a new company, Econet Wireless, and consolidation of services by Telkom Kenya will offer competition and decreased prices for phone calls.

The current GSM (Global System for Mobile Communications) service providers, Safaricom and Celtel, are demonstrating duopolistic tendencies, with each refusing to lower cross-network call charges. Calls within the networks remain relatively cheap compared to calls from one network to the other.
http://computerworld.co.ke/articles/2008/04/23/competition-could-lower-mobile-phone-costs-kenya

Competition could lower mobile-phone costs in Kenya