If, on the other hand, the customer's usage level drops off, you need to find out why it dropped and what to do about it. (blog.kissmetrics.com)
No, the spreadsheet lists typical usage levels, not the plans each carrier offers — otherwise you'd have about three times as many rows in the thing. (thewirecutter.com)
This leads to student and teacher frustration and reduced usage levels. (one-to-oneinstitute.org)