You need last version BlackBerry 10.2
For sideloading Instagram on your BlackBerry, you must install *.bar files, — better way use Google Chrome — download and install: https://www.google.com/intl/en/chrome/browser
Find PlayBook App Manager at Chrome Web Store, and install it:
Then, on your BlackBerry 10 security settings you will need to enable developer mode and set the password and IP address of the computer.
Run PlayBook App Manager:
Input your IP
Now you can install *bar files:
First you must install Android Runtime at you BB10.
Download and install Instagram 4.1
Run Apex Launcher
Switch off BlackBerry keyboard, and switch on Google .