Wooooaaah, I'm missing on the action! In 1973, Peter Drucker made a profound statement:
Because the purpose of business is to create a customer, the business enterprise has two—and only two—basic functions: marketing and innovation. Marketing and innovation produce results; all the rest are costs.
Notice there's no mention of price - Safaricom get's that; the others don't.
On another note, industry practice normally requires key partners to be exclusive. Key partners need to be developed, trained, financed etc. So you will notice Apple partners sell only Apple, Total partners sell only oil from Total, Nokia partners sell only Nokia, and Coke bottlers deal only with Coke, and Celltel partners had to paint up all their shops and only deal with ... (you guessed it).
But you can be a free agent, deal with both as a sub dealer etc.
On another note, wouldn't government time be better spent dealing with Oil cartels, EABL monopoly, Kengen and KPLC government mandated monopolies that actually harm the consumer?