The FCC approved Sony Ericsson Vivaz in February, and back then pundits suggested the phone will hit USA via ATT for the first time (and maybe last too). Those things are confirmed right now, because we know for sure Vivaz is going to be released together with AT&T plans. In its user guide there are also references to AT&T Navigator, AT&T Maps and AT&T FamilyMap, so this fact is now more than confirmed.

Sony Ericsson Vivaz is running Symbian S60 5th Edition (Symbian ^1), comes with a great 8.1MP camera with autofocus and HD recording capabilities (720p). The screen is a 360x640 touchscreen display, scratch-resistant, and other specs include Wi-Fi, DLNA, GPS, 3.5mm headset jack, social media integration (Twitter, Facebook), 8GB memory installed and is powered up by a 720MHz processor. 

There is still nothing known about the release date, but is expected the phone will be released soon.

Via Unwired View

Just before 2010 ended, a new Sony Ericsson leak showed us a future mobile phone which is going to join the Sony collection as soon as possible. The device looks like Vivaz and seems to be similar to it, but only in form and design, because the Neo will feature Android and not Symbian.

Right now no one really know the name of the future device, as its been codenamed as Sony Ericsson Hallon/Halon and coded as MT15, but sources suggest that Xperia Neo will be the name of the new handset.

The mobile phone will have an 8.1 MP camera similar to the one in the Xperia Arc and the handheld will feature an 854 x 480 display. As said earlier, the phone will feature Android 2.3 Gingerbread.

Source: Unwired View