hey today i got my iphone unjailbroken and unlocked on accident(im 14 i didnt know thatd happen if i updated it) so my dad gave me his lg ks20. he gave it to me and set everything up on it for my tmobile sim card. later that night i went to see if i had a text and it wouldnt turn on. i tried everything to get it to turn on. how do i turn it on? i hold the power button and nothing happens 