It's an unanswerable question as it depends on how big the typefaces are, how many characters there are on each etc. Also, I believe C2 uses PNG format throughout, and some things compress better than others.
Probably your main issue is going to be the amount of graphic memory that there are on some older phones. I would seriously suggest having fewer typefaces - maybe use effects if you want different colours, and not having sprites that big. Can your sprites be broken up into smaller sprites that can be reused ?