Just as the title says, what smartphone are you currently using? Are you happy with it? I'm currently on a Nexus 4 and I'm extremely happy with it. If there's one thing I could change about it, it would be the battery though. I can eek out a day fine but it's a little close for comfort sometimes. Other than that I couldn't be happier. Lack of LTE hasn't been much of a problem for me despite how nice it is. What about you?