Got a grey One X yesterday from Expansys. Overnight is cheap and easy with them. Anyway, on to the phone. My previous phones since November were a Galaxy Note, before that the GNex, iPhone 4S, RAZR, Rezound, etc....
Soooo After 1/2 day with the One X, I'm really impressed.
I'm in the USA and I had the option to select AT&T during the set up. So I got onto the ATT network very easy.
Sense 4.0 is very well done. The speed and snappiness of the phone is awesome. It's quicker than any of my previous phones.
The screen is amazing. It looks lke the images are on top of the glass. Great outside at my sons baseball game last night. Best display I have ever seen on a phone.
The headset volume is perfect and clear. Speaker is loud and clear. I haven't tried Beats Audio yet with headphones.
The camera is very good. It's the fastest camera I have used on a phone. The photos both indoors and out, are as good as I've seen on a phone.
The Build quality of the phone is tight. Looks like the old HTC. But this phone is light, but strong. Very well build. Maybe a little slick, but I have to get a better feel for it.
Battery thus far seems good, I started with 80%, used the crap out of it from 2pm to 9:30pm and had 20% left. So 60% in 7 1/2 hours of solid use is good for me as I am thinking I will get about 12 hours. But, for me I am on the go from 4:30am until 8pm most days. Only my Galaxy Note would get me through those long days. I have the ability to plug in most of the time, so it's not a major deal breaker if I can't get more than 12.
Overall I am in love with his phone. Well done HTC