The Copyright Office has granted DMCA exemptions for jailbreaking making the procedure legal in the United States in the next years. Jailbreaking an iOS mobile device it is possible to remove hardware restrictions implemented by the Apples operating system, Jailbreaking gives users root access to the iOS file system and manager, this allows them to download and install applications and themes from third-party stores. Under the new law jailbreaking mobile computing devices and smart TV is now legal under a new law in the U.S.”]
Source: https://securityaffairs.co/wordpress/41497/hacking/jailbreaking-legal-in-us.html