Semi-Tethered JailbreakĪ semi-tethered jailbreak is one that permits a handset to complete a boot cycle after being pwned, but jailbreak extensions won’t load until a computer-based jailbreak application is deployed over a physical cable connection between the device and the computer in question. Perhaps the greatest example of a tethered jailbreak was redsn0w, a (now ancient) application for macOS and Windows that could jailbreak A4-equipped devices such as the infamous iPhone 4. Without doing this, you’d experience what many refer to as a ‘recovery loop’ or ‘boot loop,’ and the device wouldn’t stop doing this until booted with the proper jailbreak tool. Only then could you get back to your Home screen to use your device as you normally would. Upon attempting to power a tethered device back on, you would need to connect it to a computer with a supported USB cable, enter DFU mode, and re-run the jailbreak tool you used previously. Should you attempt to power cycle a tethered device without a computer handy, you would be unable to turn it back on again fully to make a phone call or send a text message, and this can spell out trouble for daily-driver handsets when the user finds themselves in an emergency. Tethered jailbreaks are perhaps the most troublesome at all for end users because a dead battery can be unavoidable and this turns off your device. After the device is turned off (or the battery dies), it can’t complete a boot cycle without the help of a computer-based jailbreak application and a physical cable connection between the device and the computer in question. For this reason, we’ve compiled a quick guide to help everyone understand what each of these different jailbreaks are and how they behave.Ī tethered jailbreak is one that temporarily pwns a handset for a single boot.

We understand that some are new to jailbreaking, but even those who’ve been around as long as I have might have some confusion between the different types. Among the most popular in this community are untethered, semi-untethered, semi-tethered, and tethered, each of which exhibit different attributes that every jailbreaker should be aware of. If you’ve been poking around in the jailbreak community for as long as I have, then you’ve undoubtedly witnessed a plethora of different jailbreak types.

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