For the Z10, 10.3.2 is the sweet spot. It offers:
Before you download anything, do this:
For many, the autoloader is the preferred installation method over Over-the-Air (OTA) updates, especially when a device is "bricked" or experiencing severe lag. Official BlackBerry Z10 Specs and Features
Let me know, and I’ll give you a precise answer.
Are you a BlackBerry Z10 user looking to upgrade your device to the latest 10.3.2 operating system? Look no further! We've got you covered with our easy-to-use autoloader tool.
: Running an autoloader will permanently delete all data on the device. A manual backup using BlackBerry Link (if accessible) is recommended before proceeding. How to Use the Autoloader