Microsoft’s Windows Phone 8.1 will be released on June 24 according to a Windows Phone support page, although it’s not clear whether carriers will begin pushing their updates on the same day.

Microsoft’s support lifecycle page has been updated with the new information, listing a lifecycle start date of June 24 and a concluding date of July 11, 2017.

“Microsoft will make updates available for the Operating System, including security updates, for a minimum of 36 months after the lifecycle start date,” Microsoft notes. “These updates will be incremental, with each update built on the update that preceded it.”

As Microsoft notes, however, the distribution of the updates may be controlled by the mobile operator or the phone manufacturer from which you purchased your phone. In short: Even if you own a Windows Phone 8 device, you may not receive your system update on June 24. Carriers typically require weeks to months to years—if they push the update at all—to verify a software update for security and compatibility with carrier-published apps.