My galaxy s2x was getting really hot recently. So i went easy on the battery and didnt use data. then one day all of a sudden my phone got really hot in my pocket and turned off. so i turned it back on and checked the battery and it was 70%, so the battery was not the problem. then it got hot in my pocket again and the it turned off and this time it wouldnt turn on. i inserted another battery but it still didnt star . I dont know what the problem is. Is there a fix for this where i can save my contacts and apps that are on my phone?