Why is my Note 3 using 400+ mb/month?

[Kyle Mason1]

Note 3 has "Android OS" using 400+ mb/month

Going into Settings>Data Usage I noticed "Android OS" has used 437mb of data this month all in background mode. I have a Note 3 with 4.4.2

 

[Kyle Mason1]

Re: Note 3 has "Android OS" using 400+ mb/month

Used 74 mb today alone with auto sync off, background data restricted, location services off, as well as "Back up my data". As an aside the 437 mb used by Android OS in the one month was a 20% chunk of my 2.24 GB total usage.