You can take a screen shot by pressing and holding the on/off button and pressing the home button while holding, you don't need to use the volume rocker.
That's NFC services. You usually don't need it, go to settings-> more and turn it off.
You can take a screen shot by pressing and holding the on/off button and pressing the home button while holding, you don't need to use the volume rocker...
OK, I was saying, "He didn't ask about that; how did you know that he...?" And, then, I paid more attention to the screenshot he posted! Thanks for the tip, LC! I did not know that one!
An FYI, Sprint has a fairly good table of the notification icons in their HTC One User Guide, (should open to the correct page), where as I see the HTC Users guide does not have this list. Interesting.
Edit to add: Sorry, that Icon being asking about is not in the table, thought it was.