What do you do after you've bought the most powerful smartphone to yet grace the Android universe? Some timid folks would urge you to just enjoy it, but if you're like us, you'll probably want to know just how high that dual-core Exynos 4210 birdie could fly. The processor inside the Galaxy S II started off life at 1GHz, then got sped up by Samsung to 1.2GHz just before release, and has now been taken all the way to 1.5GHz thanks to coolbho3000 over on the xda-developers forum. He's been nice enough to provide the source code and instructions necessary to reproduce this stable overclock on your Galaxy S II, but don't rush off just yet -- there's video of the GSII romping through Quadrant and Linpack after the break.[Thanks, Mike and Sam]