if it won't go to download mode but can power but does nothing then you may be able to go to XDA forums and look for a thread titled "How to root the sch-s968c" read the WHOLE thread carefully and pay attention to what you read, you will find a link and instructions for using an unbrick img to use extsd card to create a "boot disk" so phone will boot from extsd when powered on, find an unbrick img for your device, read carefully about the differences between the sch-s968c BEFORE Aug 7 2014 and AFTER Aug 7 2014 just in case you have the one from after Aug, if so you'll have to find the H2 stock tar which isn't available yet but is in the works, make sure you find an unbrick img for your device and rom, hope that helps you