Apple supplier Foxconn will invest $1.5 billion in its India unit, the company said in a filing, as the iPhone maker shifts more manufacturing out of tariff-hit China.

But now, President Donald Trump, in his effort to return manufacturing to the U.S. by hiking tariffs, is trying to break up the happy couple. Annoyed by Apple shifting some of its production from China to India, rather than to the U.S., he said on Thursday that he had scolded Apple CEO Tim Cook about it.

Unhappy that Apple intends to source nearly all of its U.S. iPhones from India, President Donald Trump on Friday threatened a 25% tariff on the popular device unless the tech giant moves production to the United States.

United Statestech giant Apple said this month that India would play a major role in making iPhones for the US market. "A majority of iPhones sold in the US will have India as their country of origin,

The government's think tank, Niti Aayog, has acknowledged India's "limited success" in attracting investment shifting from China. It noted that factors like cheaper labour, simpler tax laws, lower tariffs, and proactive Free Trade Agreements helped countries like Vietnam, Thailand, Cambodia, and Malaysia expand exports - while India lagged behind.

Foxconn’s Indian plants have taken centre stage in assembling iPhones, and the ecosystem is expanding rapidly with contributions from other major players.

Apple’s global manufacturing realignment is gathering pace, with Foxconn’s fresh investment fuelling India’s growing status as the world’s iPhone factory.