What do you do if Blackberry App World says The data service not operational?

Oh, dude, if Blackberry App World is telling you the data service isn't operational, it's basically saying it can't connect to the internet. So, like, check your Wi-Fi or mobile data connection first. If that's all good, maybe try restarting your phone or updating the app. If all else fails, just take a deep breath and remember there are plenty of other apps out there to entertain you.