I will try to explain this simply.
My daughter no has a prepaid plan, just 15$ a month, texting mostly with a minutes booster as she needs it.
I want to turn on Data so she can send MMS/Pictures/Long texts.
If I enable data will I risk getting charges for data if she only uses MMS? If she opens Facebook/youtube will it bill by MB usage?
Best answer by Dinh
As she is on a prepaid plan and you mentioned she didn't have a data booster, she should be fine.
When you turn on data on your phone with no data booster, the system won't consume any data from Koodo cellular account (because there is none). However, MMS will go through. If she opens facebook/youtube, she would need a wifi connection.