I want to update my blackberry z3 on bb OS10.3

Now I am running bb OS10.2.1 and I want to do safely and perfectly updets on OS10.3 ......
Can anyone tell me that how I complete it...
Pls help me and give me full suggestions step by step.... please

Blackberry z3

If your asking for these questions it's probably not best to install 10.3 yet. They are early builds and you have to be confident on side loading other bars. And there's also some bugs

Posted via CB10

Short answer, you can't safely update to 10.3 yet cause there is no official release. You'll run into lots of trouble, some feature might be unstable or not working

Posted via CB10