𝕊𝕖𝕡𝕒𝕣𝕒𝕥𝕖 ℝ𝕦𝕗𝕟𝕦𝕞𝕞𝕖𝕣 𝕗ü𝕣 𝔹𝕒𝕟𝕜 / 𝔹𝕣𝕠𝕜𝕖𝕣 / 𝕂𝕣𝕪𝕡𝕥𝕠𝕖𝕩𝕔𝕙𝕒𝕟𝕘𝕖𝕤

Everyone has a mobile phone number why have another one? Not only do phone numbers stay the same for years, they are often known to a large circle of people or service providers. I won't ramble on at length about reasons and probabilities here. See, for example, [1-5] or the video.

If you want to get a permanently free phone number: netzclub.net costs nothing and you don't have to do any recharges in contrast to normal prepaid sim cards. But Netzclub sends advertising to the phone number / email.

I don't know of any providers that require a landline number, but if you need one: sipgate. There is a free local number with sipgate basic.

Tip for the registration at netzclub no account to specify, but recharge by recharge code. There is no need to enter a code and you do not have to enter account data.

If netzclub should go down the drain, the phone number is not gone. You can port your number to any provider at a later date. The costs for this are capped at €6.82 by law.

If you see a smartphone as an attack vector, you can put the SIM in an old prehistoric phone that is probably somewhere in the family anyway. Put it in the drawer at your desk and you're done.

[1] https://www.inc.com/will-yakowicz/hackers-can-steal-cell-number-to-swipe-bitcoin.html

[2] https://www.forbes.com/sites/laurashin/2016/12/20/hackers-have-stolen-millions-of-dollars-in-bitcoin-using-only-phone-numbers/

[3] https://www.cnbc.com/2018/08/18/crypto-investors-should-rethink-giving-out-their-phone-numbers.html

[4] https://www.heise.de/news/SMS-Hijacking-Zweifaktor-Schutz-trivial-ausgehebelt-5994414.html

[5] https://blog.kraken.com/post/5072/watch-krakens-crypto-security-guide-to-mobile-phones-and-wifi/

https://www.youtube.com/watch?v=UvqYtup1tsM