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Taking over the SMS functionality of any phone number in the US is trivial and can be done in 2 minutes. The phone will continue to operate as normal and the victim will likely take a while to notice anything is wrong. Never ever use SMS to secure anything.

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>can be done in 2 minutes

Citation needed. Extra credit for WikiHow step by step with badly drawn art.

Trivial if you have access to an SS7 network that has a direct access or a roaming agreement with the network of the victim, and the proper tools to do that. But you will not manage to do it within 2 minutes if you have.

You are thinking about it from the wrong angle. Even less than 2 minutes.

I was thinking of someone just walking into their local cellphone store and sweet talking the person behind the counter to transfer their number off of their old "broken" phone.

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