Did you find one iPhone?
Your iPhone was locked by iCloud account?
Searching an effective method to unlock one second-hand iPhone?
Why my iPhone was locked by Apple ID after restoring from iTunes?
Any abnormal reset of your iPhone will make iPhone get into activation lock, the iTunes can remove iPhone screen lock password, but the activation lock is still on because the find my iPhone feature was enabled.
The iCloud lock appears after restoration or any factory reset of your iPhone. Linked Apple ID and password is the best method to bypass iPhone activation lock, but when you forgot Apple ID password, get into iCloud locked iPhone should the help of EelPhone Activation Lock Removal, it's the last method to bypass iPhone activation lock without Apple ID.
In fact, if find my iPhone feature was enabled in iPhone, without Apple ID, restore from iTunes, or erase iPhone from icloud.com can't unlock iPhone screen lock, because your iPhone will get into another lock type-activation lock, which should the linked Apple ID and password or the activation lock removal.
The EelPhone Activation Lock Removal can bypass iPhone/iPad activation lock without password, it's the professional skill, but the operation process isn't difficult, just follow the guide on the removal.
The process should the help of jailbreak of iPhone, it's automatic if you use the removal on the MAC.
Note; All data and settins will be erased after the process, and some features are unavailable because of the jailbreak process, so you also should consider before using the activation lock removal.
