Airtel data plans & their subscribtion codes see below;

Daily bundles: dial *412#

The 1-day data subscription: This is literally the cheapest Airtel data plan bundle, you’ll get 30MB data cap for N100. You can subscribe for this plan by dialing *410#.

The 3-day data subscription:  You’re offered 100MB for N200 which is valid for 3 days.

Weekly bundles: dial *417#

Also, there is a biweekly (two weeks) Airtel data plan at the rate of N500 for 750MB.

Monthly bundles:

1.5GB for N1,000 (Android 1.0): You can get 1.5GB for N1,000, this Airtel data plan is valid for 30 days. dial *496# to subscribe.

3.5GB for N2,000 (Android 2.0): Airtel offers 3.5GB data bundle for N2,000, also valid for 30 days. dial *437#

5GB for N2,500 (Android 2.5): This Airtel Data Plan gives you 5GB worth of data for N2,500 which is valid for 30 days. dial *437*1#

7GB for N3,500 (Android 3.5): This data plan is offered at N3,500 for 7GB and it is valid for 30 days. dial *438# to subscribe.

Weekend data bundles: Dial *472#

200 – Get 200MB for N200 during weekends. Usable between 12am Saturday and 11:59pm on Sunday

Time base Plans(Night plans):

30- minutes unlimited browsing and download for N300. dial *439*3#

60 – You can get 60 minutes of unlimited internet access for N500. dial *439*4#

120 – 3 hours of unlimited internet surfing for N1,000.dial *481*2#