I have the same issue in app data usage, an app called 2904 that can only be found in the data usage section of mobile connections in settings. It is NOT a system app. It is an app from OUTSIDE of my phone that I did not install. It is not seen anywhere else in the phone because it is not MEANT to be seen by the user, as it is likely the only indication of an unauthorized Spy App that was either unable or unlawful to be removed. I have concluded this based on observation, onset of the symptoms that typically manifest from having Spyware on your phone, coinciding with appearance of this app in my data usage list using large amounts of data for something that is being called a "recently uninstalled app" or a "troubleshooting package". Although I am, for the most part, convinced that this indicates an unauthorized spy app, I am responding in this thread in search of definite answers about what EXACTLY this is and HOW I can actually locate this app on my phone and obtain some kind of official evidence of its incidence, placement AND the path it took to get to my phone, as well as from where and what device (and from that I can hopefully know from who.) I have included screenshots of the last three cycles of my phones data usage. During this time I have experienced the following symptoms: frequent app crashes, becoming more frequent and affecting more apps, microphone activates at random times, internet connection becomes slower and more unresponsive as time passes since the most recent restart, eventually forcing me to restart again in order to load a page or send something through, phone gets hot frequently, and the big one, I have an unknown app appearing out of nowhere and immediately consuming a relatively large chunk of my data three months in a row. My activities on the phone match up with every other app using a appreciable amount of data, except the unknown 2904 app THAT ONLY APPEARS IN DATA USAGE.
