The only permanent, risk-free way to bypass the lock is through official channels.

If you do not have a Mac, you can use a legacy DNS bypass. This does not remove the lock; it hides the activation window.

Sliver 6.2 (Mac), iBypasser Legacy , Arduino + Host Shield (for advanced checkm8 method). Always use tools from reputable legacy jailbreak communities (r/LegacyJailbreak).