Unexpected Activation Notification

[GNJBOUT]

I'm a little worried or concerned.  I had an activation notification on my phone just a little less than an hour ago.  It had the correct phone number, when I pressed on it it didn't do anything and I was only able to swipe it away.  I haven't installed anything new on my phone, only other "incident" was a page I visited popped up an advertisement (full voice/video add), but I closed the browser down immediately.  I have allow unknown sources turned off (but do have developer/debugging features turned on).  Should I be concerned with this notification?

[doloresk_vzw]

GNJBOUT, We certainly understand your concern and we want to help make sure nothing is wrong with the phone. Is it possible that it was a new app? Are you able to make/receive calls and use data?