we get this question almost everyday. the problem is that there are millions upon millions of apps that are out there, each with their own notification icon. the easiest way to find out is to go thru the phone's notifications. but something tells me that this is not your phone. you can just ask the person what it is. unless the notification is from a popular app like youtube or facebook for example, these types of inquiries usually go unanswered.....but you might get lucky and someone here might recognize it.