Copying and pasting your message into the platform, rather than typing your message from scratch, can often result in UNICODE in your message. Punctuation (in particular) can result in adding these invisible characters, causing the length of your message to increase.
Unicode characters are made up of more than 1 normal character, therefore they have a higher character value. If you copy and paste Unicode into the body of your message, you will notice the character count of your message jump dramatically.
Non-GSM (Unicode) characters change the character limit of your SMS:
1 – 70 characters = 1 Message
71 – 134 characters = 2 Messages
135 – 201 characters = 3 Messages
202 – 268 characters = 4 Messages
269 – 335 characters = 5 Messages
336 – 402 characters = 6 Messages
403 – 469 characters = 7 Messages
470 – 536 characters = 8 Messages
You’ll be prompted if there are any Unicode characters in your message, giving you an opportunity to remove them before sending if you wish.
All emojis are considered Unicode characters.