To enjoy this amazing and cheap offer from Airtel Nigeria, you need to subscribe for the SmartTRYBE service. How To Subscribe.... Dial *312# with your phone and reply with 1 to Join the Airtel SmartTRYBE For 1GB which cost N500, reply with 2 – valid for 7 days For 500MB which cost N25 and 1.5GB for N50, reply with 3 – Night Plan from 12am – 5am For 200MB which cost N200 + 30Min call, reply with 4 – Weekend: Sat and Sun Please have in mind that the call tariff on SmartTrybe remains 11k/s. Calls charges for all national networks remains N6.60K/min.Also, You can only use the data bundle from 12am to 5am. So you have to burn the night to browse with it. You can re-subscribe many time in the same night if you exhaust your data bundle The data plan will expire after one day.