That's the thing: if you try, and hold it at the right place, you probably could have a problem. (In the right location and network situation.) In practice, you

That's the thing: if you try, and hold it at the right place, you probably could have a problem. (In the right location and network situation.) In practice, you most likely don't — or, you do rarely have the problem, but don't trace it to that cause, just as the vast majority of network problems on phones aren't traced to their cause: people just try the call again. The same is true of the iPhone 4. It's just easy to find the exact place where it happens on the iPhone because it's basically marked.