Tyketto writes "Referencing a decision outlined in the Federal Register, Tech News Daily has published an article noting that the window to unlock your new mobile phone in the U.S. is closing. 'In October 2012, the Librarian of Congress, who determines exemptions to a strict anti-hacking law called the Digital Millennium Copyright Act (DMCA), decided that unlocking mobile phones would no longer be allowed. But the library provided a 90-day window during which people could still buy a phone and unlock it. That window closes on January 26.' While this doesn't apply to phones purchased before the window closes, this means that after 1/26/13, for any new mobile phone you purchase, you'll have to fulfill your contract, or break the law to unlock it."
It will still be perfectly legal to purchase an unlocked phone, which many carriers offer. This change removes the exemption for buying a new phone under contract (and thus, at a discount) and then unlocking it.