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I have done plenty of research as generally not getting sensible answers. It seems the code I need is the unfreeze / MCK code for my S7 Edge, which vodafone can provide. Please let me know how to go about getting this.
Although Samsung cannot help with unlocking the phone they might be able to supply a Mastercode.
Current Phone > Samsung Note 9 _512Gb > Model: SM-N960 Hybrid-Duos.
Samsung One Ui / Pie.
Samsung Gear s3 Frontier Watch.