Tips on how to connect Instagram with Facebook on IPHONE

I recently ran into a problem connecting my
Instagram app on my iPhone 5 to Facebook, and
neither Instagram's or Facebook's help pages were as
helpful as they claim to be.
Instagram 3.4 is supposed to have improved sharing
integration for iOS 6, supposedly making the
connection to Facebook simplified and seamless on
an iPhone 5.
Once you first try to share a photo on Instagram to
Facebook, it will tell you to go to iOS Settings ->
Privacy -> Facebook and then turn on Instagram to
give it access.
If you're lucky, it will be as simple as that. But if
you're like me, you'll never even see Instagram in the
options.
As the help page on Instagram suggested, I deleted
both Facebook and Instagram, then reinstalled, but it
still would not work. Other folks on the web
suggested disabling restrictions by going to iOS
Settings -> General -> Restrictions and making
sure it was disabled. Mine already was. Facebook
offered no help on the matter.
It could have just been a temporary glitch, but no
matter what I tried, I kept getting the message to
enable Instagram in the Facebook privacy settings on
my iPhone, where Instagram never appeared. So, if
you've been having that problem too, this is what
finally solved it for me.
How to Finally Connect Your Instagram to
Facebook
The trick is getting on your computer and going to
the Instagram app page on Facebook, which you can
get to directly from this link. Make sure you're logged
into your Facebook account before doing this, on
both the online and mobile version.
NOTE: You will not be able to do this in Safari on your
iPhone, because clicking on the Instagram app on
mobile Facebook there will merely send you to the
Instagram app already installed on your iPhone or to
the one in the App Store. So, make sure you are
doing this on your computer.
Once on the Instagram app page on your computer,
click on Send to Mobile to "send" the app to your
iPhone. Since you're already logged into the
Facebook app on your iPhone, this will simply send
out a notification to you.
Once you get the notification on your iPhone, click on
it. If you missed the popup, you can always find it in
the notifications bar, too.
This will open up your notifications in the Facebook
app.
Then, click on that notification and you should be
golden. It will open up the Instagram app on your
iPhone and finally let you share your photos.
To verify, you can go back to the Facebook Privacy
settings and see that Instagram is now turned on and
not missing entirely.
And that's it. Pretty simple, despite this not being
noted anywhere online. You'd think that since
Facebook owns Instagram, that something like this
wouldn't happen.