My nexus keeps asking me to select a default email client for ZDA (as of yesterday). I keep exiting out rather than selecting one because I don't know what in the world "ZDA" is. Anyone have any idea? I haven't downloaded anything new since I started getting this notification.
I had the same problem. So I downloaded Norton Utilities and used the task manager to see what services were running (any app that let's you see running services will work. I found a service that has ZDA in the name and traced it to a company called Zos Communications (zoscomm.com). I emailed them about this pop-up and they said that the services collects GPS/location data for use by other applications. They asked me if I used the Official NY Jets app which I did. As soon as I uninstalled this app, the problem went away. Ultimately I don't think this is a malicious app. I could also have just turned off location services in the Jets app and the problem would also have been fixed. I hope this helps.