Sorry to see you've been having this messaging popping up on your handset
Having done some research on this issue it would be a case of entertaining this if you're having issues on the phone itself.
This message can be because APN settings are incorrect on the device. If you have no problems with using the data on the device my advice would be to simply hit delete next time this notification comes up.
If you are having issues with data then it may require an alternation of the APN settings on the device which can be found here