Didn’t like OS 10.0.10.261 very much for your BlackBerry Z10? Then how about trying out OS 10.0.10.648, but ONLY if you have a BlackBerry Z10 model STL100-3, which is the Qualcomm LTE variant.
To check which Z10 you have, go to Settings > About > and look for model number. You will need a Windows PC in order to install this leaked OS.
As with all leaked OS, do take precautions. We are not responsible for any damages to your Z10. We’re simply the messenger.