PSA: Why doesn't Facebook Home work on my smartphone?

Today is the day Facebook Home is released for Android devices, and though it may seem possible to download the app for your smartphone or tablet, it won't necessarily be in full working order this afternoon. Why would that be – you might ask? Because Facebook's launch of Facebook Home is limited to just five devices – and one of them was just released to the market today.

With the HTC First you'll have the full Facebook Home experience from top to bottom – even when you download the Facebook Home app and load it to your device that's not an HTC First, you'll still not have full notifications for apps in your News Feed. Other than that, it's basically the same experience. And what about your Motorola DROID RAZR HD? You're out of luck – for now, anyway.

The Facebook Home app is working today for four devices other than the HTC First:

• Samsung Galaxy S III

• Samsung Galaxy Note II

• HTC One X

• HTC One X+

Why these four devices? The first two devices are some of the best-selling smartphones in the past year. The HTC One X and the HTC One X+ are also some of the highest-powered smartphones on the market – and they're all four carried by AT&T along with the HTC First. Sound like a deal behind the scenes to you?

UPDATE: According to Facebook, the following devices will be available for Facebook Home compatibility very soon! Can't wait!

• Samsung GALAXY S4 (Future)

• HTC One (Future)

If you're hankering for a partial Facebook Home experience before Facebook updates their development to handle more than just the five (make that seven) devices above, you'll want to update your regular Facebook app and download Facebook Messenger. With Facebook Messenger you'll get what's easily the best part of the Facebook Home experience without needing the Facebook Home launcher: Chat Heads. Hear all about it in our Chat Heads post from earlier today!

Have a peek below at some additional Facebook Home insight as well – don't forget to check out the HTC First review we've got along with our full Facebook Home review too!