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iCloud Activation Lock is a feature that's designed to prevent anyone else from using your iPhone, iPad, iPod touch, or Apple Watch if it's ever lost or stolen.
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iCloud Activation Status Check will let you know instantly if the iCloud lock is enabled or disabled with just the device's IMEI number. This check is vital if you are going to buy a second-hand iPhone and wish to avoid receiving an unpleasant surprise when you go to use it.
If the iPhone has the iCloud lock enabled, you will not be able to access the device unless you know the username and password. Neither network unlocking nor any other legal unlocking service can remove the iCloud lock.
If you do not have access to the iCloud username and password, we recommend not submitting a network unlocking request because you will not be able to complete the unlocking process without them.