The Airtel 1GB for N100 data plan is one of the best data bundles from Airtel but it can only be used during weekends. This plan was introduced last year and it's still working and blazing.
HOW TO SUBSCRIBE / ACTIVATE AIRTEL 1GB FOR N100
Recharge N100 on your airtel sim and dial *474*1# to subscribe and your data will be activated.
To check your data balance, dial *140#
Note: It might not work on all SIM card and you could get replied with "not eligible".
If yours is among this set of airtel SIM, kindly call the customer care and ask them to activate your line with 1GB for 100 naira weekend plan. You can contact them using any of their social media platforms (Facebook or Twitter is more preferable).