Just picked up a lumia 920

So i got a pretty good deal on craiglist a Lumia 920 with the wireless charger for 180 dollars. My first experience with windows phone was an HTC 8X and i was not impressed by that at all. I'm a mac user and it seems like its going to be easy syncing and such with the lumia.

I am curious about the amber update, The Lumia is unlocked and i am using it with T-Mobile for now, So i'm wondering will this phone get the update for amber or if i need to attempt to "Flash" it?

All and all i'm very impressed with it and this is the first nokia phone i have owned since 2006. All that is missing is an updated version of Snake!