!!! Overview
[{$pagename}] is typically a [Phishing] that involves a [entity] registering an existing [Phone Number] of a [Mobile Network Operator] client on a new [Subscriber Identification Module] ([SIM]) to cause an [Unfortunate event]Typically this is done in regards to an [Attack] described within the [SS7 hack][{$pagename}] involves an [Attacker] duping your [cell provider|Mobile Network Operators] through [Phishing] into believing that you’re activating your [SIM] card on another [Mobile Device]. In other words, they’re stealing your [Phone Number] and associating it with their [SIM] card.!! [{$pagename}] [Prevention]
Every major [Mobile Network Operator] offers you the option of putting a [PIN] or a [passcode] on your [account|Digital Identity]. Having one adds another layer of protection, another piece of information an attacker needs before they can compromise your [Digital Identity]]. 
That may not help against an [insider threat], but obviously makes things more [secure]!! More Information
There might be more information for this subject on one of the following:
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* [#1] - [How to Prevent and Respond to a SIM Swap Scam|https://lifehacker.com/how-to-prevent-and-respond-to-a-sim-swap-scam-1835627474|target='_blank'] - based on information obtained 2019-10-08 
* [#2] - [FBI warns about attacks that bypass multi-factor authentication (MFA)|https://www.zdnet.com/article/fbi-warns-about-attacks-that-bypass-multi-factor-authentication-mfa/|target='_blank'] - based on information obtained 2019-10-08 
* [#3] - [How to Protect Yourself Against a SIM Swap Attack|https://www.wired.com/story/sim-swap-attack-defend-phone/|target='_blank'] - based on information obtained 2019-10-08