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.

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.

In a major supply chain shift, Apple CEO Tim Cook confirmed that the majority of iPhones sold in the United States are now manufactured in India. While China focuses on non-US markets, Vietnam leads production of MacBooks and iPads.