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If you want to experience the “true” power of your Galaxy Note 2, you will definitely have to overclock to 1.8Ghz (from stock 1.6Ghz) and also see how much you can tweak/undervolt your Note 2 to maximize its performance and battery life.
For that, I do highly suggest Perseus kernel, available for most Note 2 variants including AT&T SGH-i317, T-Mobile SGH-T889, Sprint SPH-L900, Verizon SCH-i605, international GT-N7100, and GT-N7105. For Canadian users, you can use AT&T or T-Mobile versions, just match up the first 7 letters of your model number.
Perseus kernel was the Note 2’s very first custom kernel (I still remember) on the first week that Note 2 was released to the public. When I first tried Perseus kernel, it kept freezing up on me and was not stable at all, but after almost 6 months, I am glad to say Perseus kernel is one of the best kernels for the Note 2 that I’ve tried.
To install Perseus kernel, you will need to be running either stock or TouchWiz-based ROM on Android 4.1.1 or 4.1.2. Also many custom ROMs do offer Perseus kernel as default or come as an option in AROMA installer. However you install it, once you are running Perseus kernel, you will be able to easily overclock to 1.8Ghz and make your phone at near maximum speed.
Once Perseus kernel is installed, you will find an extra app in your app drawer called “STweaks” app.
And boy, you can certainly feel the power of overclocking on the Note 2, especially you are already starting out with 1.6Ghz stock, at 1.8Ghz, you get additional 200Mhz on ALL FOUR CORES, a huge difference when comparing to a dual-core slower phone.
For the average user, I do recommend overclocking to 1.7 or 1.8Ghz and if you play a lot of HD games, you can also overclock GPU to 733Mhz. Make sure you don’t set “Set On Boot” until you find a stable frequency for your Note 2 as every phone may be slightly different from others.
With undervolting, theoretically it’s possible to get much better battery life even with overclocking. This might take awhile to do so make sure you have at least 2-3 hours to test when you are tweaking voltages. Find the lowest voltage you can go on your phone for each frequency step until you find bottom, when your phone reboots/freezes. Once you find that bottom point, try choosing a voltage slightly higher to be safe. After find some good undervolting voltages, test out your phone’s battery for the next day or two and don’t forget to report back at GalaxyNote2Root.com so others can also learn from you.
There’s also more tweaks you can do with audio for your speakers and headphones, I will leave that up to your bass heads out there.
Try it out, see how much you can overclock and do post your Quadrant and Antutu scores!
To install, reboot into recovery, install kernel, and reboot!
THIS IS ONLY FOR TOUCHWIZ ROMS DO NOT INSTALL ON AOSP ROMS LIKE AOKP!