Hi, I had the problem that my glass broke, just around the joystick button (I jumped in the car and it went crack!
So I replaced it... and here is what I did,
1) go to http://www.cnn.cn and buy the screen (I brought two just in case! and now have a white face on the black phone), Also buy the case opening plastic tools, they are great!
2) I didnt remove any screws, I just picked at the glass with the tools I brought. starting at where it had cracked and moving around to the top of the screen.
😎 Remember to wear safety glasses as splinters will fly up!
3) The plastic sticky stuff gets removed at the same time as the glass, just have to be careful around the circuit board, which is only attached above the two top buttons, the best way is to go in from the top and slice down with the tools to not to break them. but I didnt find this difficult.
4) the buttons, they just remove as you pull the glass up. The joy stick button has a bit of rubber around the edge of it, just press it down as you pull the glass up. There is also the speaker gause to remove, just pull it of and remove all the sticky stuff around it. and just be aware that there is a plastic bit on the left arial that removes as well
5) clean most of the sticky stuff away, (I wasnt that thorough, just so there are no lumps), and place the new sticky pad that came with the new glass in its place and pull the screen bit off, put all the buttons back (they only fit in one way, so no mistaking buttons. and put the plastic arial thing and gause in place, and finally press the new front facia on...
and hopefully like me all is working great! took about 20 minutes and no damage to the phone as all tools where plastic.
Good Luck!