[hansy]

When I turned 16 and was excited to drive everywhere, I would volunteer to pick up groceries for the house. My dad would give me his credit card so I could purchase the groceries.

How would a similar scenario play out in the Card Case universe? I wasn't allowed to have my own credit card until college and I would never use my debit card for common house purchases.

[corin_]

It's designed as an additional way to pay, not a replacement for cards. So in your scenario you still take your Dad's card, you don't take his mobile phone, and hey presto you can pay like you always could.