It is and itsn't.
Arguably some of the best 'smart phones' in the world are made in red China. The QC practices depend on the company back in wherever their engineering is, and goes right through product engineeing and manufacturing. We had it good when the majority of our raw materials and designs were overkill to begin with - most of those countries never had that, and of course we've lost most of what we had.
The global top smart phone company is Samsung which came from South Korea. Chinese brands sell the majority of their brands within China and they limit foreign competition so the Chinese brands stay isolated to China.