Thanks airmaxx, but I thought I read that I could use odin to go back if I wanted to after rooting the OTA NC4 with towelroot. Besides, if there are problems (as I've read) with 4.4.2 NC4, then it would make more sense not to upgrade at all. Or is NC4 really that much better even with the poorer reception and battery issues? Now I'm wondering what makes the NC4 upgrade worth the time and effort. Thanks again for your thoughts.