To be honest, no, It's the app that makes it so laggy, not the phone, the dev said the app was in it's early early early stages, that's why the sound doesn't work =( It's almost like how the dreamcast emulator is now, it runs slow with little to no sound, but sooner or later it will be up and running at full speed with sound, but to be really REALLY honest, I don't see this DS emulator getting finished anytime soon, like I said, the dev is long gone, and it hasn't been updated in a long time, so unless someone else out there makes a new emulator, I don't see DS emulation coming to android anytime soon...