The MCK will unlock the phone so no need for both.
Hello, Can someone please, please help me? I have been trying to get an MCK code from O2 for nearly 3 weeks. I own my phone outright which I bought from O2 brand new, it's a Samsung S9 plus. I am now anting to give it to my Nan but we entered the sim unlock code wrong and now it is asking for an MCK code. i have spoken to a dozen people at O2 and the complaint got escalated and I was told to wait 7 days for the code then they sent the sim unlock code to me again!!! We are losing our minds here, please help.