The phone could benefit from stronger noise cancellation when outdoors, but voices are audible and not muffled.
Skype offers an alternative calling option with an always-on set-up that keeps users logged-in without using much battery.
Data speeds can vary based on where AT&T’s LTE and HSPA+ online grid has been deployed.

Rooms is a BBM-like group platform for sharing messages, calendars, photos, and notes.
Apps / App Store
Windows Phone 8 has an apps problem.
More specifically, it has a lack of apps problem.
There’s no Dropbox app, but there are apps for Box and SkyDrive.
The over-the-hood features include tabbed browsing, favorites, sharing URLs, and managing favorites.