This data bonus below is not new but has always been updated regularly. Airtel NG is offering you a whopping 1.8GB for N500 that last you for 14 days.
According to their text as seen below, the offer will be available for 6 months.
FREE 150% Data Bonus, Just For You! Get 1.8GB for just N500 valid for 14 days. Hurry, dial *418*2# now to enjoy this amazing offer everyday for 6 months.But if you didn’t receive the message above, dial
*418*2# to know if you are eligible or not.
Airtel 6GB for N1500Dial *440*161# to know if you are eligible.
This offer works on all devices but available to only circumcised sims. The validity period for this offer is 30 days.