Apple increased its exports of iPhones from India to the United States in April, with industry data showing a 76 percent increase compared to previous months. The jump came amid President Donald Trump's threats of a 25 percent tariff on iPhones made outside the U.

"We are grateful for all those who fought for our freedom," said Cook, in a social media post today.

President Trump’s steep global tariffs have supercharged efforts to evade them.