I can't wait to have a phone without a number.  Nobody, and certainly no online service, "needs" to reach me by mobile.

Unfortunately many websites are in the dark ages when it comes to SMS for 2FA.

I'm still looking for a good service provider who can provide an online SMS service for this..

ln123

The no UDP limitation is for their $5 relay service. The phone service (anonymous IMSI) does not have that limitation. But the phone service is unlimited data-only, which is a problem if you need to be reachable by a phone number.

DeezSats

bitcoin

Pretty Good Phone Privacy

This is the best news I've heard in a while.  I hope it's legit and commercially sustainable.  

There are limited details on the website.  They do have a limited presence on linkedin:

https://www.linkedin.com/company/invisv/people/

Very curious to know more about this, the technology, and the service offering(s) - such as full list of countries, technologies, restrictions etc.

No UDP over port 443, I'm presuming TCP is supported though else there'd be no TLS