The iPhone 4s runs on the 32-bit Apple A5 processor. Unlike newer devices (iPhone 5s through iPhone X) that utilize the famous checkm8 bootrom exploit, the iPhone 4s requires completely different legacy exploits.
This does not remove the iCloud lock. It simply redirects the setup to a locked home screen. You will: Iphone 4s Ios 9.3.6 Icloud Bypass
If you are purchasing used Apple devices, always ensure the seller has: The iPhone 4s runs on the 32-bit Apple A5 processor
Bypassing the lock often results in a "Wi-Fi Only" device. You may not be able to use cellular data, make phone calls, or use iMessage/FaceTime. make phone calls
Method 2: The Hardware-Level Exploit (Arduino + USB Host Shield)
If you find yourself with a locked device, the community generally follows these paths: