Latest: Try this tutorial for getting WhatsApp Plus working on your devices (If nothing else works)
Here is one more tutorial which can help you in using any version of WhatsApp on Nokia X, Nokia X+ and Nokia XL
Nokia X is here and here are two quick tutorials from Techmesto! First one is about installing WhatsApp on Nokia X, which for now is missing from Nokia store. But you can go ahead and install the ‘WhatsApp for Android’ from web on your Nokia X. it is pretty easy to install apps not available on Nokia store on Nokia X. What you need to do is to open Settings, scroll down and tap on security —>Here, tick the box in front of Unknown Sources–>Accept the warning.
Click here to go through full tutorial. If this is not working for you, You can also try our other tutorial on How to install WhatsApp, Instagram & other apps from 3rd party stores. You can watch our Nokia X and Nokia XL hands-on videos including unboxing, UI demo, full settings walk-through, native apps and review etc by clicking here and here. Catch the full Nokia X and Nokia XL coverage including extensive hands-on, camera comparison, display test, gaming and full review by clicking here and here.
Second tutorial is meant for powerusers and it is about rooting the Nokia X using Framaroot. As mentioned above, it is pretty easy to install apps not available on Nokia store on Nokia X. You can download Framaroot.apk file and root your device. Click here to go through full tutorial.