Do phones on planes really exist?

https://en.wikipedia.org/wiki/Airfone
You could pay a flat 69 cents per call or use a monthly subscription. In 2004 only two to three people were using the Airfone service per flight. Verizon Communications, Airfone's parent company, discontinued service on all commercial flights by the end of 2006. Removing the phones reduced weight and fuel.

Airfone's primary competitor was Air One, operated by an AT&T Wireless division, and was available onboard American Airlines, Northwest Airlines, and select Delta Air Lines aircraft. The Air One service was discontinued in 2002.

Many of the in-flight calls made by victims of the September 11, 2001 terrorist hijacking attacks were made over Airfone and Air One.

I laughed when the guy sitting next to them was trying to use the air fone at the same time.