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 has sold over 3 billion iPhones since its first smartphone in 2007. Samsung got there first, but there are some caveats to consider.

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.