Hi! I´m trying to explain (first to me, then to others) the logic behind PhoneModels ;

The first number 8XXX tells us the style;

9xxx Communicator
8xxx Premium
7xxx Fashion
6xxx Classic (?)
5xxx Active
3xxx Expression (?)
2xxx ?
1xxx Entry(?)

But the second (something about functionality?), third and fourth number?

Any help would be appreciated