... do you reckon it's best to get a MAC key from an ISP even though it is apparently unnecessary (?) if switching to full LLU?
Essential for two reasons.
First, as per this thread, though we have occasionally heard of ISPs that won't accept it as technically it isn't needed. That's because they can just take the phone line and they don't need a MAC to do that, but it automatically ceases the existing broadband. I think that's when a charge arises. Then they just set up the broadband themselves once they have control.
Second, many ISPs take the date of request or issue of the MAC as the start of the notice period you have to give, if you go through with the migration. So if you haven't asked for one they will either start the notice period from when it happens, or even worse say you still have to give notice so keep charging until you do. That has caused a few heated arguments.
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