Is owning a phone a legal requirement now?

Question

Almost all government services & applications require that you list a phone number, as do a lot of commercial online services.If so, are there any ramifications to that? Should the individual be solely responsible for that cost?

GGSteele · Accepted Answer

Your phone is essentially your ID card, but on steroids.

Pyrodogg · Answer

And not just any phone number either, a certified Mobile Phone Number!Google Voice is slowly getting kicked out of more and more SMS based auth systems.

Is owning a phone a legal requirement now?

Almost all government services & applications require that you list a phone number, as do a lot of commercial online services.
If so, are there any ramifications to that? Should the individual be solely responsible for that cost?

Your phone is essentially your ID card, but on steroids.

And not just any phone number either, a certified Mobile Phone Number!
Google Voice is slowly getting kicked out of more and more SMS based auth systems.