It's safe to say BlackBerry's social media manager had a rough day.

A tweet aimed at promoting the cell phone company's Twitter for BlackBerry app was ironically tweeted from an Apple iPhone.

BlackBerry is tweeting from an iPhone http://t.co/TAlDTazdsX pic.twitter.com/DUI3Nwuy6A

— The Verge (@verge) January 13, 2015

The embarrassing mistake could only be spotted on third-party applications that reveal what client the individual used to send out the tweet.

The tweet was later deleted from the account.

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