Not sure for ATT, but 8.1 for 920 is guaranteed.
Likely being unveiled later this year.
but we can't give a remotely accurate estimate for when you can expect a update notification.
Anybody know how likely WP8.1 on AT&T L920 are for 2014? Any guesses on when?
I just got the 8.1 update on my ATT Nokia 920 today!