The iTunes Store is unable to process purchases at this time. Please try again later.
If you own an iPhone you probably get a pop-up that reads “The iTunes Store is unable to process purchases at this time. Please try again later.” followed by an “OK” button. This means that your phone is trying to communicate with the Apple iTunes server and the server is not responding.
Apple has a page dedicated to inform users if the status of their services. You can check it by clicking here.