UPDATE Verizon and RIM have pulled OS 4.7.1.53 after releasing it for only a few hours. Apparently this OS was bad and really messed up some Tours. If you attempted to upgrade to this OS let me know if you were successful in the comments. *

BlackBerry OS 4.7.1.53 for the Tour 9630 was just leaked a few days ago but it looks like Verizon has decided to make it official and is pushing it out through BlackBerry Desktop Manager.

Here is a changelog put together by BGR:

• Improved MMS notifications
• Improved Visual Voice Mail app
• Improved sound quality for Bluetooth headsets and voice calls
• Fixed geo-tagging error in the camera application
• Fixed an error with DRM music skipping
• Improved video player
• Added BlackBerry Messenger update notifications — check for new BBM updates automatically or manually.
• Fixed an issue with device restarting after activating morning alarm
• Fixed an issue with memory cleaning and sluggishness
• The first character is no longer duplicated when dialing from the
  home screen.
• Your smartphone may not have detected headset removal, causing it to remain connected to a disabled headset.
• When prompted to add an email account in the Setup Wizard, your smartphone may have jumped to “Bluetooth® Setup,” leaving you unable to navigate back to email setup.
• If you tried to save changes to a contact that only contained a company name, you may have received the error message “Contact updated externally. Changes will be lost and the view closed.”

This update is only available through BlackBerry Desktop Manager and not through Verizon’s BlackBerry Downloads site (at least right now). To get this update load BlackBerry Desktop Manager and plug in your Tour 9630. Everything should be automatic from there.

Even though this is an official update you should always backup beforehand in case something goes wrong. Let me know how you like the update in the comments!