Which retail product innovation holds the Guinness World Record for the fastest-selling consumer electronics item in history?

The retail industry has witnessed some incredible innovations and record-breaking achievements throughout history. Major companies have pushed boundaries in product development, marketing campaigns, and customer engagement strategies that have earned them places in the record books. Test your knowledge about the most impressive retail world records and see if you can identify which groundbreaking achievement actually made history!

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Apple's iPhone 6/6 Plus (2014) which sold 10 million units in its first weekend
Sony's PlayStation 4 (2013) which sold 8 million units in its first month
Amazon's first Echo device (2015) which sold 5 million units in its first quarter
Samsung's Galaxy S4 (2013) which sold 12 million units in its first three weeks