Looking for a bypass for iPhone 5 or newer? Those require the same Checkm8 exploit but demand more advanced USB-Attacks. For the iPhone 4s, you are in the sweet spot of security research.

These are interposers that sit between your SIM card and the phone’s tray. While these can sometimes unlock a phone that is (meaning it is tied to AT&T or Verizon but has no iCloud lock), they cannot bypass an iCloud Activation Lock.

: Paid tools like UnlockGo or PassFab iPhone Unlock provide automated interfaces to remove locks, though they typically involve erasing all data on the device.

If you own a locked iPhone 4s and have a genuine right to use it, start with Method 2 (Sliver). It’s free, requires only a Mac, and takes 10 minutes. If you succeed, you’ve rescued a piece of smartphone history.