How to get free mtn 1gb for buying 500mb for N500

How to get free mtn 1Gb for buying
500mb for N500
Mind blowing MTN super surprise is here
again..
Do you know that you can get Free 1gb
data for buying 500mb at the rate of
N500??
Yes ooo my brother it is possible but
NOT yet confirmed by me.
This data plan valid for a week (weekly
plan) and MTN said if you buy 500MB
from them with N500 they will give you
free 1gb valid for one week too.
How can I get the 500mb and free 1gb
To get this offer first migrate to MTN
ipuse by dialing *406*1# , after
successfully migrating.
Dial *406*2*1# to buy the 500mb for
N500 and you will be given additional
1gb