What do other ("Real") phones do?
Easy, they only let you dial 999,112 or 911 (depending on where you are), and they've been like that for years, ever since someone first came up with the key lock idea, and someone else pointed out that it might be useful for someone else to be able to use your phone to call for help if you're not able to following an accident. Although these days the odds are that the other person will have their own phone. Gives you an idea how long this has been standard for "Real" phones.
So yet again the outside "Ooooh, pretty" laminate of the iPhone has been scratch to reveal a pitiful understanding of what exactly a phone does, and how people use them... Did Apple not think to have a look at another telephone to see if they could learn something before making their attempt? Then they might have given it a flash, more than a 2 megapixel camera, and MMS support too.
Honestly, the "know your customer" department in Apple must consist of an empty room with a mission statement across the wall saying "Don't worry, they'll buy anything with a fruit logo stuck on it".
Paris: Cos even she could come up with a better design draft.