Originally Posted by
lincolnjkc (Post # 248)
Before you could just tap it in and the kiosk could figure out if you entered a PNR, MP#, or one of the other valid entries... Now you have to explicitly tap that you're entering your MP# (the default is PNR). . . .
Unless UA is also trying to make everyone memorize their PNRs (I'll admit I used to but no longer even attempt to) there's not a benefit to them.
Thank you for clueing us in to this essential first step!
I admit to trying to memorize my PNR, or having it readily available, while standing in the kiosk line.

But knowing about the "select MP #" option will make things much smoother.