The practice, it is to be noted, also voids your device's warranty, as it's a violation of Apple's End User License Agreement that you agree to every time you purchase a new iPhone. You can, however, use Wi-Fi to connect to the Internet.
The vulnerability could leave users around the world exposed to the danger of data theft, ransom demands and other malware attacks. But without security updates, the risk to the user of being hacked goes up exponentially.
In fact, it seems that this latest accomplishment has only been made possible by the checkm8 bootrom exploit that was discovered previous year that renders everything from the iPhone 4S to the iPhone X permanently jailbreakable.
It is adding warnings to its reviews of potentially affected smartphones so consumers are aware of the risk. While the seventh-generation iPod touch (which still uses an A10 CPU) also appears to be supported, the team hasn't yet made any builds available for that device. Of course, if a new jailbreak is found that works reliably for the A12 and A13 equipped devices, there seems to be no reason that Android couldn't come to those as well.
"Google and phone manufacturers need to be upfront about security updates - with clear information about how long they will last and what customers should do when they run out".
Which? states that anyone using an Android phone released around 2012 or earlier - including popular models like the Samsung Galaxy S3 and Sony Xperia S, should be especially concerned since it's likely they will be running a version of Android that does not include various security enhancements Google has been rolling out since.
Android phones can be rooted, and iPhones can be jailbroken to unlock new features, but so far, it's been close to impossible to get Android running on iPhones, given the mobile device hardware constraints and software limitations.
The Samsung Galaxy A50s (pictured) launched past year with Android 9.
This is not a fan project since Corellium is a company specialized in the virtualization of mobile operating systems.
Firms such as Google encourage users to instead update to a newer version of the operating system in order to best secure their device from modern cyber threats.
The older the phone, the greater the risk.
Google has not responded to MailOnline's request for comment regarding the Which? report, although it declined to respond to the watchdog's request for an exact figure on how many UK-based Android users are at risk.
Which? says it was not reassured by Google's response.
According to the Android security bulletin, there were no security patches issued for the Android system in 2019 for versions below 7.0.