strange symbol at the top of my screen

[Android Question]

I have a symbol that has appeared at the top of my screen recently and I can't seem to figure out what it's trying to tell me. it a shaded square with what looks like 2 lightening bolts back to back in it. any clue?

 

[OutOfPhase]

Thank you for asking this question and for checking out AF. I think the symbol you are referring to is the NFC (near field communication). Does the image look like this

You can check out what it is here. Near field communication - Wikipedia, the free encyclopedia