If you don't happen to be one of the lucky BlackBerry 10 owners that was issued a new software update, you aren't totally out of luck. After doing a bit of research, we found that even if you aren't on a carrier that has pushed a new OS version, you can still manually update your device software using BlackBerry Link or the BlackBerry Software updates page from the web. The process isn't 100% guaranteed to work for everyone, but it's worth a shot if you want to load up the latest OS.
There are two ways to try to force a software update on your device. This can most times be done with the SIM installed, however if you are having trouble finding any updates you may want to try removing the SIM card and then giving it a go.
Also, be sure to do a full backup of your device before you try to update the OS. Your device will restore to the factory defaults and you'll lose all of your date. You'll also need to reinstall any sideloaded Android apps you had previously after the update. Note here too that I did this with a factory unlocked device. If your device is locked to a carrier there is a good chance this process won't work for you. As always - use caution when updating your device OS. If you break anything it's not our fault :-)
Update from the web
The first method is to use the BlackBerry Software Upates page from the web. You'll need to be on a Windows PC for this one as well.
Update using BlackBerry Link
If neither of these options work for you, you can always try tracking down a SIM card for the carriers pushing out the updates. Rumor has it that even unprovisioned SIM cards will let you grab an OS update OTA on your device.