@bigye,ati it takes 5 minutes to download 100KB on zain?, are you willing to put your money where your mouth is? wacha porojo and lets try it out practically.
...anyway,...Now that you download your 700MB using safaricom,how much does that cost you,since you pay-as-you-go it costs you Ksh 7000. or if are you using the cheapest bundle that will be Ksh. 1750 and you will have used up 70% of your 1GB bundle.
How much would the same cost on Zain,unlimited daily bundles from between Ksh 180 to Ksh. 250 per day. and you will still have your unlimited bundle.
So,its really a trade off between speed and cost.