The Android's kernel controls many aspects of the operating system, so when you replace the operating system you replace the code that keeps Android running. Android custom kernels, also called ROMs, ...
Installing a custom ROM pretty much obliterates it. There are a few methods for downgrading your phone back to stock, and though they're not simple, CNET TV has a How To do that, too. The custom ROM ...
Developers have started to release custom kernels for the Amazon Kindle Fire which allow you to make a few nifty changes to the tablet. For instance, you can overclock the CPU or GPU when using the ...