The Verge initially spotted the tweet and BlackBerry deleted it shortly thereafter. This isn't the first time this has happened to the company. Alicia Keys, named BlackBerry Creative Director, was caught tweeting from an iPhone after saying she was exclusive to BlackBerry 10. Keys later claimed her device was hacked and she didn't post the tweet.
The fail is even more embarrassing for BlackBerry as the company pitches its devices and their physical keyboards as being much easier to use for texting.
Take a look at the tweet below...