It's a fascinating project, a labor of love and good old hackery, with roots in the phone "phreaking" subculture. In addition to free calls, they have some crea

It's a fascinating project, a labor of love and good old hackery, with roots in the phone "phreaking" subculture. In addition to free calls, they have some creative ideas for the payphones, such as connecting strangers. Pay Phones Are Coming Back in Philadelphia Thanks to Linux - https://www.makeuseof.com/payphones-are-coming-back-in-philadelphia-thanks-to-linux/ https://www.makeuseof.com/payphones-are-coming-back-in-phila... How open source is revitalizing the payphone - https://opensource.com/article/22/11/open-source-payphone-philtel https://opensource.com/article/22/11/open-source-payphone-ph...