The latest version, at least for Nexus devices, is actually 5.0.1. So I imagine that will be the update that's released for Samsung devices. I expect it will be released some time in January, depending upon the service provider. One thing for sure, it won't be held until the release of the Note 5 (or whatever Sammy chooses to call the next Note). That won't come until about September/October 2015. So I look for Lollipop on the Note 4 within the next month or so.