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Probably one of the coolest features of rooting and custom ROMs/Kernels is that you can overclock your phone to a blazing CPU frequency, resulting in a Note 2 that can run near 30-50% faster than a stock phone.
Well, if you have a T-Mobile Galaxy Note 2 SGH-T889 (or Canadian models starting with SGH-T889), you can install the Bullet kernel that supports up to a whopping 1.9Ghz overclocking. Now, not all phones support such high CPU clock speeds but who knows, you might be one of the lucky ones.
Luckily, my T-Mobile Galaxy Note 2 does support 1.9Ghz overclocking with stability.
You can install this kernel on any stock ROM or custom ROM running Android 4.1.1 and use overclocking app like SetCPU to overclock to your desired speed. For daily usage, I recommend 1.7 or 1.8Ghz and for those of you hardcore gamers, you can try 1.9Ghz.
I do notice a vast improvement in speed with all the Note 2s with overclocking more so than older Android smartphones, I believe this is most likely due to the fact that there’s 4 CPU cores and you are essentially overclocking all four of them.