An untethered jailbreak permanently modifies the bootrom signature check. If a thief steals your phone, they can access all data even after a reboot. With semi-tethered jailbreaks, a reboot returns the device to a secure stock state.
exploit, generally covering iPhone 5s through iPhone X. Recent updates have expanded support to include A9X devices like the original iPad Pro. iOS Support iremovalra1n
: Most users use iRemovalRa1n specifically to prepare their device for the iRemoval PRO tool, which can bypass Activation Lock screens on supported hardware. iremovalra1n