I found this on the MTN website:
"Who is MTN DataShare available to?
All MTN PayAsYouGo, MTN Flexi, MTN Classic and My MTNChoice customers."
So why can we not share data on the "My MTNChoice 400GB" plan?
I'm on the 500GB + 500GB @ R500 p/m. According to the app this plan is called: My MTNchoice 400GB.
It seems like only 100Gb is shareable since I have the following bundles (excluding night data):
My MTN Choice Anytime 5G (Expires 31/01/2021) - 226.67GB
Promotional Data - I used up this data...