Ram is always 1.3 to 1.5 used, leaving a hundred or so mb, when the phone is idle for ten min or so, once you open it the nav buttons dont work, home back , all the buttons down, but the apps open and i could use them. I have to click the on off button once or twice to get it working again, im referring to the nav buttons, once its operational its ok throughout yuor cellphone use, just dont leave it idle again coz its gonna hang again