I'm desperately sorry to tell you everywhere I've been with my iPhone I've gotten enough signal to make a call. Even if I get that rare Call Failed, usually a redial will be the remedy to my woes. Yes, at times my service drops to a bar, but still rarely do I lose calls. Maybe I'm lucky who knows. But in core performance, my iPhone has worked (opened up apps, etc.) faster than any Droid and Blackberry phone that my buddies have. i like the iPhone because it's simple, yet effective. And most of all, it just works. I can't say that it's perfect, or there isn't anything else I wish for. In my opinion the iPhone is the best preforming smartphone on the market.