Review: HTC Titan II for AT&T
The T2, like the Nokia Lumia 900, runs the latest version of Windows Phone 7.5. On the surface, it doesn't behave any differently than Windows Phone 7.0 or 7.1. As far as modern smartphones go, Windows Phone is about as simple as it gets with respect to the user interface and it offers most of the coveted features.
The lock screen offers up notifications for items such as missed calls or messages. They will appear along the bottom of the screen. Slide the screen up to unlock it. As I've noted in other reviews of WP7 devices, the notifications are limited to providing an unread count, but don't offer previews of text messages or missed calls. The only lock screen shortcut available is to the camera, which you can reach by long-pressing the camera button.
There is but one home screen panel, though it is infinitely long. Home screen elements are arranged in vertical columns made of squares and rectangles. There are no widgets, but some of the squares/rectangles — or Live Tiles in Microsoft parlance — have live, updating information, such as the weather report. You can arrange these tiles however you wish, and add or delete them. The one neat thing about them is you can pin really specific things to the home screen, such as a particular email folder, or pictures posted by Aunt Tilly.
Slide the home screen to the left to access the system menu, which offers a list of all the apps/services on the device and the controls for the phone's behavior. This list is in alphabetical order and can't be rearranged. Settings of individual apps can be tweaked from either the system tools or within the app directly. In order to adjust app settings, look for the three little dots (probably at the bottom of the screen).
Those are the basics, such as they are.
As far as performance goes, you have nothing to worry about. The T2 is a really fast phone. Nothing about the UI is slow or stuttery. Apps open in a blink, and close just as fast. I was able to multitask quickly between five different apps with no problem. Windows Phones have no speed issues in my experience, and the T2 doesn't break the streak.