iPhone 5 Gets Really Hot

After having used it for a couple of weeks now, I've noticed that it gets really hot when I'm browsing the Internet with 3G. It's cool when I'm running over WIFI.  It gets hot when I am doing voice calls, too.  Not sure if this is normal?

Set Default XCode

Context:
XCode 4.3
XCode 4.5

Problem:
I want to keep XCode 4.3 and default to XCode 4.5.  I want to switch between the two.

Solution:
At command line,

xcode-select --print-path to show the current path
sudo xcode-select -switch /Applications/XCode4.5/Xcode.app

Apple iPhone 5 - Unhappy Customers - Apple Failed

Context:
Advanced Apple User and Owner - owning many Apple products (iPod nano, iPod, iPad, MacBook Air, MacBook Pro, Mouse, Keyboard, Headphones and now, iPhone)

New Apple iPhone 5

Problem:
Ok, we preordered three new iPhone 5.  Two of the iPhones (mine and one of my brothers' rattle.  Sounds like the internal components are loose.  My brother took his to the Apple Store and asked what was wrong.  They replaced him with a new one.  He didn't pay too much attention to the new one -- thinking that it must be good since it's coming out of the box.  He walked out of the store.  On his way, he noticed that there was a nick (notch, dent, scratch, however, you call it) on the silence switch.  He went right back to the store and asked for another one.  They refused to replace again.  WTF?  We are very unhappy with the situation.  I still have the rattled phone.  Right now, only one of the three is good. One rattles; and the other one has a nick.  Looks like Apple failed us this time.  This makes me think twice now before I buy another Apple product.  I always thought that Apple products were high quality, and their customer service was top notch.  Well, today, I certainly don't think that way anymore.  I've recommended and persuaded my friends to buy Apple products before.  I guess I can't and won't do that anymore.  Apple, you lost my trust and loyalty in you.

Solution:
Apple needs to correct this problem before the customers become too unhappy and never want to buy Apple products again.