The celestial framework file of an Apple iPhone is opened by first opening the folders for system, library and frameworks. Apple does not provide a method for accessing the phone's file system, but several third-party applications can open system files. Users typically access the celestial framework file to increase the volume of the phone's speakers.
Another method for accessing system files on an iPhone is a process known as jailbreaking, which removes restrictions on installing software and making other changes to an iPhone. The process allows access to an iPhone's file system and allows loading additional applications that are not approved by Apple. Restoring an iPhone with the iTunes software reverses the jailbreak and reinstates the restrictions.
As of 2014, Apple periodically issues various software patches that reverse jailbreaking, and jailbreaks typically stop working when a new version of the operating system is installed. The legality of jailbreaking is murky; intentionally thwarting technological protections is illegal under the Digital Millennium Copyright Act. However, there is an exception for jailbreaking mobile phones. Apple states that jailbreaking may violate the warranty of the iPhone. However, a 1975 act by the Federal Trade Commission precludes companies from completely voiding the warranty of a hardware device unless it can be proven that a malfunction is due to the installation of unauthorized software.