Unlock Samsung USA – AT&T (NCK + MCK Only)
From this service, you can place the order for any Samsung AT&T USA phones. Once you will place the order, server will provide the unlock code (+Counter Reset Code). Means, if you have already exhausted all unlocking attempts, then phone will prompt for “SIM Network Unlock MCK”. You can use MCK code to reset the unlock code counter and NCK code to unlock the phone.
To retrieve the unlock code of Samsung USA phone, we only need 15-digit IMEI.