how do we protect sky sims against the type of scam where the scammer transfers the phone number

[jackl]

how do we protact sky sims against the type of scam where the scammer transfers the phone number to a sim controlled by themselves. Can we add a password to help protect against this sort of scam. 

[TimmyBGood]

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@jackl wrote:

Can we add a password to help protect against this sort of scam. 

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You should already have an online password and a telephone password for interactions with Sky: protecting those (by not using them elsewhere, having them easily guessed or inadvertently revealing them) is your responsibility.

Where there's not already a telephone password in place, the criminals need to gather additional information about you.