I've had the phone for about a week now. The first few days the battery would get really low before like 6 pm! Of course, I was using the walkman, playing games, and changing the theme every 2 seconds (It was a new toy lol). So yeah, the past few days the battery has lasted a lot longer. I still use everything exstensivley and the battery lasts long considering.
My signal hasn't been really great. When I go to my fiance's house I get "Emergency calls only" when I'm in rooms, but that's normal with phones here (in Guatemala). But when I'm in my own house on the phone, it never cuts out like my razr did.