Originally Posted by DonB
What carrier are you on, sound like your data is not working properly when you are away from WiFi ?? Have you tried posting in your device forum to see what others say there ?? You may simply need to update your device data, or call your carrier and have them send a refresh signal.
This...and sometimes data works weird and their are settings in those apps to only sync over Wifi, make sure this isn't checked.
Otherwise, it does sometimes take awhile for notifications to push through on data...