How to get 5mb for just N5 on MTN through Ipulse Enhanced

We've been enjoying this plan for a long time ago,when we pay N5 we get 5MB to browse for 1 day and in old times when using it we dial *406*1# and now if you dial the number it say "you have already opted in for the ipulse enhance peak off rate".Which means it didnt work again meaning they've changed the number so the number they were using to opt in and opt out for mtn ipulse enhanced which the new code is # i mean #406# after dialing it press ok again and choose 5 to opt in and to opt out choose 4.If you want to do it directly without waisting much time to opt in try #406*5# and opt out also #406*4#.The reason why we opt out is if we bought 5mb sometimes ago to rebuy you'll need to opt out then opt in again cause if you purchased 5mb before and you opt in again the response is "you have already opted in for mtn ipulse enhanced" so you"ll need to opt out again you can also buy it 10 times a day just be opting in and out.Also only people on mtn ipulse can enjoy this plan.enjoy while lasts for a day.