Activation lock
hello, i live in Jamaica and bought an unlock used iphone6 plus 2-3 years ago on amazon. i gave my little brother the phone, unfortunately the screen got cracked and after several tries the phone was disabled. after a few months we fixed the screen and wipe the phone only to see the activation lock came up. i put my icloud email and password seeing that i was using the phone before him did but its saying " your email cannot unlock this iphone" his icloud address said the same. what cam be done to unclock the phone?
iPhone 6 Plus