Apple Inc. reported its fastest quarterly revenue growth in more than three years, easily topping Wall Street estimates, after demand picked up for the iPhone and products in China.

Apple reported strong iPhone sales and rebound in revenue from China, giving a much-needed boost to two parts of the company’s business that had struggled over the past year. That better-than-expected performance reassured Wall Street investors that key parts of its business are holding steady as Apple struggles to keep pace with rivals in the artificial intelligence race and navigates President Donald Trump’s looming tariffs.

Apple may be the tech company most exposed to the Trump-era global tariffs, with the majority of its iPhones still manufactured in China. But the company calmed Wall Street’s concerns with its latest financial results, which showed a surge in iPhone sales. CEO Tim Cook also laid out a roadmap to ease the impact of levies.