@Yummy .It is not. I was talking about 2FA might not work at all right after porting. There is always delay for copule days before 2FA fully work again after a poritng Even voicecall would not work 100% after porting, depends on which provider the one making the calls use
Phone number calling, text delivery is a kind of network routing and it takes time to populate across systems.
First, not all system know the new "home" of the number right after you port. Main providers, like Roger-Bell-Telus, will usually pick up the new "home" of the phone number almost instantly. Other VoIP providers, like Fongo-TextNow-MagicJack, take longer, could be 24 hours or more. 2FA (like those from your email, paypal, etc) are sent from systems, those systems take the longest to learn the route, could be couple days
Second, to avoid for fraud that people's number got ported away illegally, most banks have set different kind of delay for 2FA text. Could be 3 days or some could be a full week.
Yes, if you have ported your number, don't expect receiving 2FA immediately to login banks or email. Also, SMS 2FA is not the best , not the most reliable and definitely not the most secure way of 2FA. Consider using Authenticator app instead if the systems give you the option
