What do you mean they are being activated wirelessly....are you not aware it's happening and users are just calling in and saying their devices are going thru the activation?
There is a way to show when a device has been activated, but need to run a sql query against the database. You can use an itty bitty program call QueryExpress and run a query like this:
from userconfig a, userstats b
where a.id = b.userconfigid