Okay, so I wasn't able to test t-mobile functionality but I'm sure it won't be a problem after devs get ahold of the phone (i currently don't have a sim card in it, nor a gsm card currently available). and as far as the phone itself it's quite enjoyable. The software I have on here is the same they had at CTIA (hell it still has pics from CTIA on there lol) which isn't that stable. But the custom interface is nice and definitely caters to the 3D for the phone with the 3D+ menu. The 3D+ menu you can get to either by pressing the 3D button (where i personally think the camera button should be) or by a shortcut or by a widget which has all the options available. those options they have in the menu are 3D apps and games, 3D camera, 3D youtube, 3D guide (very helpful, ill get into that) and of course the gallery. Now for the 3D itself, as long as you hold it at the right angles and distances it looks pretty damn awesome. I myself hate 3D glasses and don't enjoy 3D movies just for the eye strain, but this seems to be a lot easier on the eyes. It came with a bunch of demo 3D videos, which are awesome and show of the potential quite well. The depth on it is great, I've seen as much as 4 fields of depth (like 4 different objects at different distances). 3D youtube also works very very well. The only thing I don't like about the 3D media is that you get slight scanlines (interlaced) look on it which doesn't really hold you true HD values. But still looks quite great. Now the peeve that I have with the current software (which i'm sure will be worked out in the final release) is taking pictures and videos for yourself. you have to become quite acquainted with the placement of the camera and how it will affect your pictures and videos. As soon as you take a picture the settings are off enough to where it will hurt you eyes, but there is an option to change the 3D formatting (which camera is placed where, i.e. left picture as main or right picture) and the 3D depth adjustment (your best friend) which allows you to manually adjust the lining up of the pictures. In this version of software I've noticed crappy battery life, but I'm sure the new kernels will make a world of difference, the web browsing and 3D gaming (in 3D too, like NOVA in 3D, which is awesome) is very fluid and powerful thanks to the dual-core OMAP4 processor.
So in essential everything works as promised, just wait for the final that they release and you should be blown away. All of my friends reactions, and retail people at staples (cell phone area) were amazed by the quality. The phone is also quite light and the screen is bright as hell.
anymore specific questions? let me know =)