Earlier, older versions of bypass tools were "tethered," meaning that if your iPhone ran out of battery or was restarted, the bypass would be lost, and you would have to reconnect it to a computer to activate it again.
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The R3 series, particularly v2.4, has refined the bypassing mechanism, making it faster and less prone to failures during the jailbreak/bypass process compared to its predecessor, R3 v2.3. 3. Comprehensive Coverage Earlier, older versions of bypass tools were "tethered,"