According to reports from Digitimes, 2019 iPhones will mount a USB-C port to replace the current Ligthning.
A first new feature related to USB-C connectivity could already be implemented in the new iPhones expected by the end of the year, with a pack inside which users will find a Lightning -> USB-C cable and an 18W charger.
In 2019, then, there should be a complete transition with the new iPhone without a Lightning port, replaced by a USB-C port. This would be the second major step after the one from the 30-pin dock to the Ligthning port in 2012 with the iPhone 5. In 2019, after seven years of life, the Ligthning port could then retire and be replaced by the USB-C connector .
If the news were confirmed, 2019 iPhones would also be the first to integrate a non-proprietary connector, since the USB-C protocol is not exclusively linked to Apple.