Steps to Overclock or increase CPU Speed of iPhone and iPod Touch Step 1. Navigate to System/Library/System/System Configuration/PowerManagement.bundle/ Step 2. You will see a file named “com.apple.SystemPowerProfileDefault.plist” Step 3. Instead of editing, you are just rename it to “SystemPowerProfileDefaultbak.plist” so the device does not recognize it. Step 4. Do a reboot and you overclock your iPhone. Increasing the clock speed would degrade the CPU’s lifespan and is therefore not recommended. Do at your own risk.