Before my parents and I went on our 3-week trip to Vietnam, we clearly told my oldest sister not to call us via our home phone because Optus charge us A LOT (and I do mean a lot) for international fees.

As always, she didn’t listen to us. We just got our home phone bill charging us AUD$41 for a 23 minute call to my Vietnamese mobile. 

Guess who’s gonna pay for this?