I decided to see how “Places” stacked up with Foursquare. I reactivated my Facebook account and reinstalled the iPhone app. Went to “Places” and clicked “Check In,” and… nothing. It mentioned something about turning on Location Services. I know I already have that enabled because other apps are using it without problem. Turns out you need to enable Location Services explicitly:
First, go to the Settings app and select General:
Select Location Services:
Make sure Facebook is enabled (On) if you want to use Places. If you want to disable Places, make sure this is set to Off.
Evan Hoffman's Blog 
Thanks so much! I had the same problem and it was driving me crazy!
worked a treat
I’ve been trying to figure this out for a while…Thanks!
Thank you! this has been driving me crazy trying to work it out!!
my general settings doesnt have the location services there! Is that normal haha
If you don’t show location services, go into Restrictions. Enable them set a pw and then turn on FB then you can disable again and it should work.
Thank you so much. Other people were describing the settings on facebook, when what I needed was the setting on the phone itself. Thanks again
this helped so much!
i couldnt figure out what hppened?
thanks!
how can i turn off any tracking but still keep find my phone?
this is a good article thanks
Thanks so much for showing me how to check in at my location. I been wanting to do it but when i read the facebook help it would say setting..but they didnt (general) setting of your iphone not my setting in my facebook page.. the screen shot help alot.. I had to restrictions then location services.
Thank you for the info! Extremely helpful article.
Thank uuuuuuuu !