I was thinking, what should PM have in regards to Data on 90 Days, from the lightest data user to the heavyweight Data Consumer, and thought of this:
Lightest data user: 750 MB, 1 GB and 1.5 MB
Middle Data user: 3 GB, 5, 6, 7 GB
Heavyweight Data Consumer: 9 GB, 12, 15 and 18 GB.
Some Compromises that makes sense.
For Add-On Data, thought of These:
250 MB, 500 MB, 750 MB, 1 GB, 1.5, 2, 2.5. 3 GB should be considered sufficient for the Add-On Data Consumer