Yeah, you show the check-in staff the SMS on your phone and they ask that you turn the phone off per the usual regs once on the a/c. I wonder what happens if someone disputes your seat and your stuck trying to turn your phone back on. It's almost comical thinking of the FA telling you to turn off the phone at the same time.
I also notice that it is only applicable for SYD-MEL beween 6 & 10 AM.
Credit cards which earn frequent flyer points is a popular way to earn frequent flyer points. You can receive thousands of points on everyday spend. And, many of these cards offer generous signup bonuses! Compare to find the credit card that best suits your needs.