Mysterious, recurring data hits

Read the note at the bottom of your usage reports. It should say that data is posted to your account approximately in 3 hour intervals and may be delayed as long as 72 hours from actual usage.  So this is not only normal, it's intentional, and it's how Verizon does it too.

I did read that; funny, it didn't make sense then but does now. It's collected data that posts at intervals. I just don't understand where it's coming from, though, because the multimedia and text uses all show up individually as well. Thank you for your response!

It's coming from the cell phone usage for the lines that you indicate. It is collected data from all of the usage from various sources, whether the people on those lines are accessing social media, browsing, listening to music that they are streaming over the Internet, checking YouTube videos and anything else they might do like turn by turn directions, even using Voice to Text requires a data connection.

    All of these activities may be intensive enough so that the data is accumulated and posted at three-hour intervals. Sometimes data is posted at other times as well. Usually the difference in the collection and the posting has something to do with the tower the phone was connected to or the activity whether it was sustained or brief. For example streaming video or audio tends to post when someone turns off the service or connect to Wi-Fi. So that data is going to post at 3, 6, 9 or 12.

    You may also notice that these times are when the phone is home. You would think that this data would be posting when the phone was away from the house and using mobile data, but because of the 72-hour delay it is not unusual for those relays of data back to your account to occur when your phone is off, or home connected to Wi-Fi.