As we know in this year the newest iPhone will appear in three different versions, but information about their specifications are closely guarded. Many sources published information about Apple's problems with processors. At first, Apple only used processors developed by Qualcomm, and this situation changed in 2016 when Apple also used units manufactured by Intel. In 2018, the American company was completely dependent on Intel and in this year it Apple tried to change it, as evidenced by talks between Apple and various entities, including Samsung and Mediatek.
It seems that negotiations have not brought expected results and Apple in 2019 will have to depend on units manufactured by Intel. The breakthrough for Apple may be upcoming year, because then company will support 5G connection in their devices. Some sources claim that Apple is even considering creating its own 5G chips, but for now it's just gossip.