Hi guys, the last time I used a windows device was the treo 800w. I know a lot has changed since then and I really want to try Windows Phone 8. My question is regarding compatibility with T-mobile. I looked around and only seem to find mixed answers. I live in NJ close to NY, is anyone using this phone with LTE in those areas? Also, the person I am going to trade my phone with has the att version. If I unlock it, will it relock once 8.1 or a newer version comes out and I flash that? My last question is that the phone has 2 small cracks which are not too major in my opinion, I plan to get them fixed later on, but would I need the digitizer and LCD or just the LCD will do? Sorry if these are noob questions, I appreciate any help. Attached are the photo of the phone. Thank you.