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.

New research claims that sales of Apple's iPhone in China grew during the last quarter, giving it growth for the first time in years — although still not enough to beat local manufacturers.