Unicode messages can contain national and other special characters, check this if you use non latin-1 characters. Your messages will require more space, so you can write less characters into single message.
Unicode-boodskappe kan diakritiese tekens en ander spesiale karakters bevat. Merk hierdie as u karakters buite Latin-1 gebruik. U boodskappe sal meer plek benodig en 'n enkele boodskap kan dus minder karakters bevat.