OEM (Original Equipment Manufacturer) unlocking is an Android setting. It allows users to unlock the bootloader, which is the first step toward rooting a phone or installing custom software like LineageOS.
Unlocking software obtained from random shortened links can be a Trojan horse. Only download unlocking tools from official sources: your device manufacturer's website, GitHub repositories of trusted developers (like the platform-tools package from Google), or well‑known XDA forums threads. http bitly oemunlock
One of the most confusing aspects of unlocking is that the OEM Unlocking toggle behaves differently depending on the brand. http bitly oemunlock