The first iPhone by Cisco was a VoIP phone, which allowed users to make Skype calls without using a computer. Ultimately, both the companies reached an agreement, and have kept their rights to the name.
iPhone was conceptualized in late 1980s -Back in 1983, the developer of Apple computer, Hartmut Esslinger idealized a landline phone that had features somewhat similar to today’s iPhone and iPad with a stylus-controlled interface. Though, the design was never developed into a real iPhone, it’s surprising that Apple had iPhone ideas years ago.