You can make an iPhone on your own.
But first you need to reach China’s Shenzhen.
Shenzhen is famous for having all the parts/spare parts to assemble a phone. If you go now I hope u will also get a Qualcomm Snapdragon 835 chipset as well.
This man and his journey to build an iPhone 6s by buying all parts at the market where all the cell phone parts are available and by assembling them.
Claps to this guy for giving the knowledge for tech enthusiasts and the viral video is here.