In just a mere three days after its release, Apple's newest iPhone 4S has already sold over four million units. This is over twice as fast as the iPhone 4 sales last year, which was 1.7 million units in three days.

This year's launch, however, saw the addition of a new carrier. Sprint joined Verizon Wireless and AT&T when the 4S was released. Also, the phone was released in two more countries than the previous model.

On just the first day it hit stores, Sprint and AT&T reported that sales were at record high. If sales continue going strong, we could be seeing a new gadget record worldwide.

The previous record for fastest selling electronic device was the iPad 2 back in March of this year. In the first 80 days, it sold up to 156,000 tablets a day. The 4S will surpass that record if sales figures show a higher unit sold per day.

In addition, Apple notes that iOS 5 and iCloud users are on the rise. By the end of the month, Apple will be releasing the 4S in 22 more countries, adding to the current list of Australia, Canada, France, Germany, Japan, and the UK. By the end of the year, 70 countries will have the iPhone 4S. Indeed, Apple has built an empire.