You are allowed to modify iOS Software in this case because it is an exemption to the DMCA. https://en.wikipedia.org/wiki/Jailbreaking_(iOS)#United_States http

You are allowed to modify iOS Software in this case because it is an exemption to the DMCA. https://en.wikipedia.org/wiki/Jailbreaking_(iOS)#United_States https://en.wikipedia.org/wiki/Jailbreaking_(iOS)#United_Stat...