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Hi I have received a 8 digit unlock code what seems to not be successful I am looking for a master code as advised by an advisor but every time I ring customer service I have no joy could someone please help
Which model of phone are you trying to unlock @Briantweddell ?
Here are some recent threads with master codes in that may help.
If these don't help then ask customer service or Live Chat to esculate this to the Nuc Unlocking Department and they can also give you their direct email address too.