I'm having a bit of trouble with overclocking. I'm running Fission 2.1, no theme at the moment. I tried using the built-in overclocking zip files but they made my phone extremely slow and very unstable. After that I downloaded Jrummy's Overclocking app. I can only get up to 1.15Ghz on all four voltage settings before my phone craps out on me. I've tried going higher on different voltage settings but to no avail. What am I doing wrong?