What Are the Limitations on SMS Messages?

International SMSs (sent to mobile numbers outside the Chinese mainland)

SMSs in English:

• GSM-7 characters are used for counting.
• If an SMS contains 160 characters or less, it is counted as one SMS.

  If an SMS contains more than 160 characters, every 153 characters are counted as one SMS.

• If an SMS contains 158 English characters, it is counted as one SMS. If an SMS contains 164 (153 + 11) characters, it is counted as two SMSs. If an SMS contains 320 (153 + 153 + 14) characters, it is counted as three SMSs.
• For example, if an SMS template contains variable ${NUM_8} set to 123456, that variable is counted as six characters.

SMSs in other languages:

• Each Unicode character, such as a letter, digit, punctuation (full-width and half-width), and space, is counted as one character.
• If an SMS contains 70 characters or less, it is counted as one SMS.

  If an SMS contains more than 70 characters, every 67 characters are counted as one SMS.

Chinese Mainland SMSs (sent to Chinese mainland mobile numbers)

• Each Unicode character, such as a letter, digit, punctuation (full-width and half-width), and space, is counted as one character.
• Length of an SMS = The number of characters in an SMS template + The number of characters in the signature
• If an SMS contains 70 characters or less, it is counted as one SMS.

  If an SMS contains more than 70 characters, every 67 characters are counted as one SMS.

• Each letter and digit in a signature is counted as a character. For example, [HUAWEI] is counted as eight characters.
• For example, if an SMS template contains variable ${NUM_8} set to 123456, that variable is counted as six characters.