MTN How to change usage limits

One of the things I have downloaded on my Samsung S8 is the MyMTN app. One thing I like about this app is that it enables you to change your usage limit. I just want to record how you do this.

On your phone:
a) Dail *141*5#
b) Choose Option 1 and follow the prompts thereafter.
c) Whatever you set the usage limit to will show on the app as well.

If you want this to be a one-off thing you must remember to turn it off again after you have bought your data.

I have just turned mine off and MTN sent a message to say if I want to change this at any time to dial *136*5# at any time.  I am not sure why this is a different number, but I am going to record it anyway!