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 Unlocked Android Runtime for BlackBerry 10.2 from Mega here, or from Google Docs here
Download and install Instagram 4.1
For checking keyboard error you can download and install Android Keyboard from Google Play, also you must install Apex Launcher.
Run Apex Launcher
Switch off BlackBerry keyboard, and switch on Google .