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Hello friend
I just try this code and it work for my airtelng sim which I can activate 25gb with just #500.
Yeah.....is so cheap right yes
It is a shocking dataplan but it works for me and I wish to share to my Nigeria hive friends.
HOW TO ACTIVATE
Recharge #500 and dail *312#
Choose smart plan
Choose #5000 plan
Then click and boom the data will be activated with jus #500 for 25gb with just 7days.
Enjoy Friends......