I tried using that phone, but I found Kai OS to be pretty awful from a usability perspective. Maps was completely unusable - which was a large reason why I bought the phone in the first place. On top of that, the texting app is extremely laggy to the point where you'd wait a second for a word to show up. I don't know if the problem is with Kai OS or with the apps themselves, but my Samsung A-157 blows that phone out of the water from a texting usability perspective (but does not have GPS)