: If you can contact the previous owner, they can remove the device remotely. They must sign in to iCloud.com/find , select the iPhone 4s, and click Remove from Account .
For users without the original owner's information, these community-developed methods are often used, though they may have limited functionality (like no cellular service). iphone 4s activation lock bypass ios 9.3.5
I notice you're asking about bypassing the Activation Lock on an iPhone 4s running iOS 9.3.5. : If you can contact the previous owner,