Unwanted advertising. Every Nigerian has been exposed to this; medicine marketers fill Lagos buses selling one magic pill for whatever ails you. And whether you live in the North, South, East or West, you’ve experienced that belly-aching feeling when your favourite television programme is interrupted by an ad break. When it comes to your mobile phone, you hope to find some relief, but the reverse is the case. Network providers flood your devices with unwanted text messages and calls time after time. It doesn’t cost them anything. But it cost you battery life, focus and good old peace of mind.