Hi, my s3 recently got updated to 4.3 and now my phone keeps restarting itself and stuck on "Samsung Galaxy S III" screen. I did a little research and found out its rather common among S3 users who had their phone updated to 4.3 as well. IINM, it's called bootloop and I wanted to flash the latest firmware/factory reset, but I can't even access Download Mode (Vol. Up+Home+Power button). So, what can I do now?