It's complicated. Here is the long answer. The Hard Truth: No Permanent Free Bypass Exists Let’s clear the air immediately. There is no software tool you can download today that will permanently remove the iCloud lock from an iPhone 4s on iOS 9.3.5 for free.

Stuck with an old iPhone 4s running iOS 9.3.5 and an Activation Lock? Here is the honest truth about bypass methods, DNS tricks, and why most paid services won't work. Introduction

If you are the rightful owner, call Apple. If you bought this phone from a stranger without checking the iCloud lock, unfortunately, you likely own a paperweight.