The celtel argument at the time was justified .The reason being even as safaricom is testing their 4G the 2G penetration is still very low there some places where there is no signal.
If you look at India for instance they are rolling out the 3G spectrum this year having exhausted the 2G.I think safaricom strategy is a waste of resources and should first exhaust their current capacities before embarking on an infrastructural upgrades that would be utilized by a very small section of its target market.
'......to the acknowledgment of the mystery of God, and of the Father, and of Christ; 3 In whom are hid all the treasures of wisdom and knowledge.' Colossians 2:2-3