so i have had my thunderbolt for about 9 months. how long does the manufacturers warranty last and what exactly does it cover? will i end up paying the 100 bucks for a new phone either way? The phone doesnt respond to my touch anymore. i cant answer the phone, i can't unlock the screen. nothing. but it is receiving all emails, calls, texts, FB tweets, etc. I just cant see it! what should i do? screen isnt cracked or broken. i take good care of the phone.