President Donald Trump has threatened Apple with a tariff of “at least 25 percent” just for its iPhones unless it moves production to the United States.

“I have long ago informed Tim Cook of Apple that I expect their iPhone’s that will be sold in the United States of America will be manufactured and built in the United States, not India, or anyplace else,” Trump wrote on Truth Social. “If that is not the case, a Tariff of at least 25% must be paid by Apple to the U.S. Thank your for your attention to this matter!”

The threat comes a week after Trump declared that he’d “had a little problem with Tim Cook,” following reports that Apple intends to source all of its US iPhones from India, which will require ramping up Indian production. Just yesterday the Financial Times reported that FoxConn, Apple’s main manufacturer, is developing a $1.5 billion plant in southern India’s Chennai to supply iPhone displays. Apple has been diversifying its production for several years, which was accelerated by both covid and US animosity towards China.

India is currently subject to the “baseline” 10 percent tariff that applies worldwide, while China is at a higher 30 percent rate, though that could rise substantially in August once a 90-day reduction in rates lifts. Phones, and most of Apple’s other products, are exempt from the majority of those rates anyway, but the ongoing uncertainty gives Apple good reason to continue expanding production outside China.