I get a couple dropped calls every week and as far as messaging, I can only do text unless I am away from base. The phone is tough, I dropped it onto concrete from two stories up and the only thing that happened was the battery flew off. No scratches or cracks though. If other carriers had better service / plans I would definitely switch.

Inside building, still doable. Glad it's not from home.

I live on Marine Corps Base Camp Lejeune. I have to go outside to use my phone, drops too often. I am not happy with Sprint at all. Do not get Sprint if you live on this base.

With U.S. Cellular I've had an extreme minimal amount of calls dropped. (1 or 2 at most) To boot, I think most of the time it was because the person on the other end lost signal initially. Able to recieve / transmit calls inside every building I've been in so far on Camp Lejeune to include the Barracks and my work place which the infrastructure is wrapped with nothing but metal and other signal disrupting factors, yet the phone keeps all its original functions.