We ran across something interesting this afternoon where Romit Mehta over at Techie-Buzz noticed a Visual Voicemail prompt appear on his Nokia Lumia 800. Keep in mind that Visual Voicemail is supposed to be limited to AT&T's 4G LTE phones.
After entering the password, sure enough the Visual Voicemail page appeared on the Lumia 800's call screen. While it seemed promising, the voicemail page was stuck syncing new voicemail messages with no real functionality.
We tried this out on a Samsung Focus, Samsung Focus S and an HTC Titan and could not replicate Mehta's results. It could be a case where AT&T is testing the waters in select markets to offer Visual Voice Mail to non-LTE phones. Then there's always the possibility a technician over at AT&T hit the wrong switch.
We really like Visual Voicemail and wouldn't complain a bit if AT&T did throw the switch and let non-4G LTE Windows Phones have this feature. Let us know below in the comments if you've seen Visual Voicemail pop up on your non-4G LTE Windows Phone.
Source: Techie Buzz; Thanks, Romit, for the tip!