Apple’s (AAPL) iPhone 5 quickly became the fastest-selling smartphone of all time when it launched on major U.S. carriers and in key international markets one week ago. The Cupertino, California-based company sold 5 million new iPhones in the device’s first three days of availability alone, leading some to call the launch “epic” despite having missed a number of Wall Street analysts’ lofty projections. Sales have seemingly remained strong since then and on Friday, the iPhone 5 becomes available on regional U.S. carriers including Appalachian Wireless, Cellcom, Cricket, C Spire, GCI and nTelos. Apple’s new iPhone also launches in 22 additional countries around the world on Friday including Austria, Italy, Netherlands, New Zealand, Portugal, Spain and Sweden. BGR reviewed the iPhone 5 earlier this week and called it Apple’s most impressive mobile feat to date.

Zach Epstein has worked in and around ICT for more than 15 years, first in marketing and business development with two private telcos, then as a writer and editor covering business news, consumer electronics and telecommunications. Zach’s work has been quoted by countless top news publications in the US and around the world. He was also recently named one of the world's top-10 “power mobile influencers” by Forbes, as well as one of Inc. Magazine's top-30 Internet of Things experts.