i have been having trouble with my phone frezing up lately, i am usually able to get back on if i chage it but this time nothing is working. im trying to remove the battery but im not sure how that is done. i think i have to remove some small screws and i dont have right tools for that, i dont want to damage the phone. i bought the phone in april so its fairly new. the screen is black and all i can see is the notifications with the small icons on the top bar. im not sure what to do please help.