This one can be filed under "incredibly specific." The question is simple: What happens when a new email arrives in the iPhone's Mail app?
That question may sound ridiculous at first. You may immediately say, "Of course I know what happens! I get a new email! Isn't it that simple?" But do know what really happens? How does Mail.app decide to deliver email?
The design of Apple's Mail app is proof that it's all about the details...