Earlier this week, we saw OS 10.1.0.1483 roll out to developers. Many non-developers loaded on their device only to discover that it wasn't exactly a full OS.
Now though, lbfe from the CrackBerry Forums has either found (or put together) a full version of OS 10.1.0.1429 for several of the BlackBerry Z10 variations out there. In any case, we're going to treat this as a leaked version and give the regular warnings and disclaimers that go along with that.Right then, as always - use caution when installing a leaked OS like this and remember if you break your phone it's not our fault. Also, a good idea to make a backup because you're essentially performing a factory restore on your device. If you don't want to lose data, a backup is needed. You'll need a Windows PC to install these files and If it goes downhill, remember you can always wipe and restore your device.
source : crackberry