I remember when Etisalat just launched its mobile network in Nigeria (2008, right?), I believed no one will ditch his MTN, Celtel or Glo line for it. In a way I was right, nowadays everyone simply adds to the SIMs he already has and not swap them out.
Let's start with calls. From my analysis Glo is the cheapest for calls. With Glo's infinto package, you'll make calls at a flat rate of 25k/s to all networks in Nigeria, and don't get me started on their international call rates, it's unarguably the cheapest at N15/min to China, UK, USA and (can't remember others). Though, Etisalat also brandishes a 25k/s call rate, but it's with a daily access fee of N20. Only MTN comes close (and could be cheaper if you only call MTN numbers and call for long too), after you get charged at 58k/s for the first minute your subsequent charge becomes 17k/s to other MTN lines and 35k/s to other networks. But don't be deceived, to beat Glo's charges you'll need to make more than a 6min MTN-MTN call or else the initial 58k/s will give an average call cost of more than 25k/s. Just stick to Glo and you won't have to ask for everyone's MTN number only. Oh! As for Airtel, their plans are never short of vague to me and can never beat Etisalat, which Glo now beats. So just leave Airtel out of it.
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