The simplified dictionary key which represented English the way it was
spoken was originally developed, under contract, for an avionics application.

Malone taught the system to his curious son and his son taught the code to his
preschool friends. The kids became code literate in the process of exchanging messages.
More at Wikipedia

This group has helped revive interest in this code and has found a way
to represent it in a way that aligns with the Carnegie Mellon Pronunciation Dictionary

Those participating in this group should download the latest Unifon fonts
so they can view the all cap alphabet rather than the keyboard entry code.

To make sure that you have the latest fonts go to message #1295

To view Unifon without downloading the font, go to
www.unifon.org/convert.htm

Dis iz u Sxrt sampul uv Ynifon.
Unless you download the font, it will display as a keyboard code.

Can you read this?

"wuns upxn u tIm u lxng tIm ugO Dc livd u fer prinsus."

If not, you could learn the 12 unfamiliar sound signs in about 15 min.
There are only 40 sound-symbol correspondences you already know over half of them.