please help, i cannt boot into recovery mode. my new samsung galaxy s3 battery life sux. after hours research on google, someone suggests me to do a factory reset then clearn all cache in recovery mode. I have tmobile galaxy s3 (SHG t-999). I hold volume up , home, and power button. Tried so many times, never get into the recovery mode. however if I hold volume down, home and power button. I can get into download mode easily. What did I do wrong?????? btw, its a new s3 phone, not rooted yet.