My advice, if you are in an EK lounge wait until 55 minutes beore departure, ask if the seat next to you is free, they will check and usually, if OP-Ups are on that day and your name was pulled out, produce your new boarding pass there and then.

If that fails, then you ask for the upgrade using your miles!

Has worked for me on odd ocassions....

Odd as in been upgraded the odd time. Again, usually J - F

Good luck

DW