How To Use Airtel N400 And Get 600MB

Just understand the below step and if you have any problem just send it to Mosesjoseph209@gmail.com or make use of the comment below. Thanks.
HOW TO GET 600MB
WITH #400 ON
AIRTEL SIM
CARD FOR 1 WEEK
*. Recharge you Airtel with N400
*. After a successful card recharging dial this *440*2#. Then you will be promoted by them sending you a message that you have gotten
600MB.
*. Then quickly switch