I'm using the Nokia Lumia 920 with Windows Phone 8.1 Developer Preview. I face some problem today is I've already turn on the cellular data, it does shows me that it is already turn on, but my top status bar there didn't show that I did turn on the cellular data even I restart my phone and try again also the same problem occur. Besides that, I've tried to surf the internet through the Internet Explorer, I can't even access to the internet through the cellular data even I'm turn it on already. What had happened actually? Hope anyone can help me from this. Thanks in advance.
This screen shot that I've taken with my Nokia Lumia 920. I'm proving that I already turn on the cellular data but status bar there didn't show it up like E, G, H, H+, LTE signal.