If you’re among those who simply must have the latest OS, even if it means loading it through some unconventional ways, you’ll be pleased to know that OS 10.3.1.2726 update files are now available for all BlackBerry 10 smartphones including the technically not yet available BlackBerry Leap. Autoloaders for the files have yet to be created but given all the needed files are available for them to be created, you can either make your own or wait for someone else to build them.
Source: iMore