How to calculate your SMS credit usage
The number and type of characters used for an SMS message will determine the amount of SMS credit used.
A standard message contains up to 160 alpha-numeric characters, including some symbols). Messages containing 160 to 319 characters would consume 2 credits, etc.
Messages with at least one special character limits an SMS message credit to 70 characters. If sending a message between 70-139 characters with a special character, it would use 2 SMS credits.
Here's a non-exhaustive list of standard characters. If your message only contains the below characters then the character limit per SMS message credit is 160 characters:
Here is a non-exhaustive list of special characters. This means that if your message contains one of the below characters, the character limit per SMS message credit is 70 characters:
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⚠ Certain Cyrillic, Arabic and Mandarin characters may also limit your message to 70 characters.