Bypassing the Activation Lock can be achieved through several methods, ranging from temporary DNS-based access to more permanent hardware-assisted solutions. Official Removal Methods
Which of those would you like?
: If you can contact the previous owner, they can unlock the device remotely. They must sign in to the iCloud Find Devices portal , select the iPhone 4s, and choose Remove from Account . Once they do this, the lock is instantly lifted upon the next restart. iphone 4s activation lock bypass ios 935