As much as carriers would want to keep devices locked to their network to make switching service impossible, this is fortunately just a pipe dream. Last December, the United States Federal Communications Commission (FCC) was able to successfully pressure major U.S. wireless companies to agree to unlock their devices for use on other domestic networks.
The US House in February passed a device unlocking bill and now the nation's third-largest wireless operator Sprint has responded by announcing it will make all of its devices released after February 11, 2015 unlockable for use on competitors’ wireless networks without repercussions...