MCK Code

Question

Hello, I was provided a code to unlock my S20 ULtra 5G from ATT, but now it is asking for an MCK code and I am told I can only get it from you. What information do you need from me?

ChronicTacos20 · Answer

An MCK (Master Control Key) code for a Samsung phone is a network unlock code needed when a carrier-locked device asks for it after too many incorrect SIM PIN/PUK attempts

Andrei_idontknow · Answer

Oh no, don't try to guess the MCK code, since if you put it incorrectly too many times, it will no longer accept all codes (including the correct one). To pass that menu, you have to tell your carrier or Samsung to ask for your specific IMEI (found in *#06#). And then ask the NCK (network code key) from your carrier to be permamently unlocked from your original carrier.

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MCK Code

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