Launch date: July 9, 2007

Fatal flaw(s): Production issues, stock issues, lack of support 

The Neo 1973 didn't so much fail as get killed. Launched in 2007, Neo 1973—named after the first year of mobile phone usage—was made using open source hardware and software. However, production issues and stock shortages made it damn near impossible to find one. Rumor has it FIC, the company behind the project, has another model in the works.