Remember that post (a long time ago) where we warned you about the ethical aspects of jailbreaking your iPhone devices as a Christian? Well, Apple has (another) official statement on it:
…Apple strongly cautions against installing any software that hacks the iPhone OS. It is also important to note that unauthorized modification of the iPhone OS is a violation of the iPhone end-user license agreement and because of this, Apple may deny service for an iPhone or iPod touch that has installed any unauthorized software.
Read the rest of the support article, and remember that agreeing to your terms of service is a vow you make between you, the carrier, and Apple. Breaking a vow tends to not look so well in the eyes of God and man.
If you don’t like the restriction, get to know what an unlocked phone is, and change the way you do mobile.