Hi, welcome to Android Forums, I'm rabidhunter, I'm here to help. It looks like that grey blinking triangle could be a number of things. It could mean that you've reached your data threshold or that you are on roaming. How is your carrier coverage in your area?
Try dragging the notification down by swiping from the top and pull it down like this
That should give you more information and tell you what the notification is about.
I hope this helps you out, if not, please repost your question.
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