BlackBerry Messenger will be arriving on iOS and Android in exactly three weeks. T-Mobile UK revealed the date on Twitter, teasing a photo of the previously BlackBerry-exclusive chat service running on a Galaxy S3. BlackBerry announced last month that BBM would be going cross-platform sometime during the summer, and that its first release would support devices running iOS 6 and Android 4.0 or higher. CEO Thorsten Heins said at the time that bringing the chat service to other platforms was a sign of confidence — but while BBM may have been a unique service several years ago, it's now going up against built-in services like iMessage and a slew of chat apps all vying for dominance.

Update: BlackBerry tells us that the release date revealed by T-Mobile UK is inaccurate. BlackBerry's full statement is below.

On May 14th, BlackBerry announced plans to make its ground-breaking mobile social network, BlackBerry Messenger (BBM), available to iOS and Android users this summer, subject to approval by the Apple App Store and Google Play. While there have been reports that BBM will be available to iOS and Android on June 27th, this is not accurate. We will communicate an update as soon as we have an availability date to share.