It only cost $18.50
From MTS website:
Add someone to your calling plan for only $18.50/month* and receive:
> Unlimited cell-to-cell calling between you and the buddy anywhere, anytime in Manitoba
> Free long distance calling in Manitoba between MTS Wireless customers
> Unlimited Text, Video and Picture Messaging
The Buddy Plan provides a simple, cost-effective wireless solution for you and your spouse, friend or family member.
It's easy, too – you each have your own phone and number, but there's only one bill.
The Data Buddy Plan must be added to a non-buddy plan.