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My concern would be something more like getting 2FA codes stolen.

Does that mean you keep changing your phone number with mew SIM cards? Or can/do you port it each time?

You only need to buy the sim once, but even if you kept buying new sims you can port your number each time.

I only use the SIM card for data. I do not know what phone number is on the SIM and would never use it. Instead I use VOIP for OTA calls and SMS.

Don't they need your address for E911?

Only if you set up wifi calling.