You might be interested in the Pyra, though it's rather chunky for a phone - it nails every feature of your wishlist except dual SIM. It won't come with Android

You might be interested in the Pyra, though it's rather chunky for a phone - it nails every feature of your wishlist except dual SIM. It won't come with Android (that's the "lighter, snappier OS" part) but porting should not be a problem. Worth noting that global carrier support is an extremely difficult feature if you include all the wacky US carriers that don't use GSM. In the Pyra's case, there are actually two versions - the "US" version and the "everywhere else" version.