Earlier quoted context omitted.
They "manufacture the phones from the motherboards to the packaging" ... perhaps the case, motherboard, packaging, but still importing the components, in particular the system-on-a-chip and display? In that case, "made entirely" wouldn't be accurate.
Are there even any producers of low-level components & lcd displays outside China, Taiwan, Korea etc?
In addition to the US, there are and several throughout Europe, Russia, and former Soviet countries. Plus many countries throughout Asia.