Jailbreak iOS 6.1.3 - Is it legal in the U.S?

Yes. Jailbreak iOS 6.1.3 is legal in the U.S.! You can download this tool for your iPhone & iPod Touch. The Library of Congress approved a DMCA exemption in 2010 for jailbreaking cell phones, including the iPhone. Jailbreak 6.1.3 is the easiest way to free your device. Experience iOS 6.1.3 as it could be, fully customizable, theme-able, and with every tweak you could possibly imagine. Cydia tweaks for jailbroken iOS 6.1.3 improve the mobile experience of millions of iPhone or iPod Touch users, including many who were encouraged to try it by the ease of use of jailbreaks.

Jailbreak iOS 6.1.3 for iPhone 5 or iPhone 4S not yet. Only for iPhone 4 and iPod Touch 4G!!!