These tools generally target older iPhone models (typically iPhone 6s through iPhone X) that are susceptible to the exploit.
: Many free or low-cost tools bypass the lock but do not restore cellular signal (No SIM/No Network). Full "Signal" bypasses usually require a paid service or "token" to register the device's MEID on a server. Security and Risks
: Unlike "tethered" versions, an untethered bypass allows the device to reboot without needing to be re-connected to a computer to re-apply the bypass.