NOTE: This works for new registered sim only, so don’t think of trying it on your old sim.
=> Get a new Airtel sim and make sure is registered.
=> Make sure the SIM is registered. You will be immediately welcomed to the “Welcome To Airtel plan”
=> Recharge N1000 on your Airtel sim card using this ussd code *555*Card Pin# in that format.
=> You will be credited with 1GB worth of Internet data and 1k bonus airtime for only Airtel to Airtel calls
=> Dial *431# to subscribe to airtel blackberry data plan of 3GB that will give you total of 4GB and you can also use on Android just click Here
=>Dial *123*175# to check the sub mb
=> You can check your data balance and bonus by dialing this ussd code *556#
NOTE: N200 Recharge will give you 200mb while N500 will give you 500MB with extra airtime respectively, so don’t be left out