you advertise like it is easy to locate my phone but can't figure out how to activate my phone
Not really sure what you're referring to. Could you elaborate?
Sorry for the last q just noticed your comment below. It is easy to find your device in dynatrace.
From the sidebar select user sessions and then you could filter by device and then choose a device value like the screenshot below.
Not only this, you will find it useful to search for browser type and also browser family in case you were not interested in just mobile device, or if it is a visit from a mobile web (where it is not an app and thus no device specifically).
Hope you find your phone 🙂