True Type fonts don't seem to work on Windows phone.
The first screenshot is from Android, the second from Lumia 640 WP10.
Form hi = new Form("Welcome");
hi.setLayout(new BoxLayout(BoxLayout.Y_AXIS));
hi.setScrollableX(false);
hi.setScrollableY(true);
Label l = new Label("THIS IS 10, this is 10");
l.setUIID("BigLabel10");
hi.add(l);
l = new Label("THIS IS 8, this is 8");
l.setUIID("BigLabel8");
hi.add(l);
l = new Label("THIS IS 6, this is 6");
l.setUIID("BigLabel6");
hi.add(l);
l = new Label("THIS IS 4, this is 4");
l.setUIID("BigLabel4");
hi.add(l);
l = new Label("THIS IS 3, this is 3");
l.setUIID("BigLabel3");
hi.add(l);
l = new Label("THIS IS 2.5, this is 2.5");
l.setUIID("BigLabel2point5");
hi.add(l);
l = new Label("THIS IS 2, this is 2");
l.setUIID("BigLabel2");
hi.add(l);
hi.show();