How To Fix Foursquare Notifications On The iPhone
This is the problem that I had for a week or two: I could not check-in to Foursquare even though my iPhone appeared to be OK in that every other app as well as call reception was functioning properly.
After playing around with the iPhone, I eventually found a way to turn Foursquare back on on my iPhone so that it would allow me to check-in again, follow friends who check-in, find a location for a cold one, etc.
First, go to the “Settings” app icon on your iPhone home screen and choose General (NOT Notifications – don’t be fooled!!) …

After selecting “General,” choose “Location Services”:

Then, turn Foursquare “on” on the “Location Services” screen:

Go back to your Foursquare app and try to “check-in.” Should work.
August 21, 2010 – 3:09 pm