The Twitter Inc. application and logo are displayed on a laptop computer and Apple Inc. iPhone 5s.
Bloomberg via Getty Images
By Jack Linshi
January 14, 2015

A tweet posted Tuesday to BlackBerry’s official account looked perfectly normal — except for the part that said “via Twitter for iPhone.”

The text, which reveals that the update was sent from an iPhone, a competitor, is not visible in Twitter’s main app but can be seen in others like TweetDeck and Tweetbot, The Verge reports.

The tweet, ironically, encouraged BlackBerry’s followers to download Twitter for Blackberry. It was deleted shortly after.

Contact us at editors@time.com.

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