The problem with our phone is the people developing it further all got different phones. [nano] is the most recent (February), and is the best for our phone. It's smooth and problem free...much better than stock and easy to install. Just don't get too excited. There's nothing fancy available for the premia and probably won't be. I've had mine for a year now, and I like it, but I'm gonna get a used something else as soon as possible. The phones by Samsung get longer term development from custom rom guys. Hope that helps.