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SMS 160-character count
GSM-7 SMS is 160 characters per segment. Unicode (emoji, many non-Latin scripts) drops that to 70. Concatenated SMS still bills per segment.
GSM vs Unicode
English with basic punctuation usually fits GSM-7. A single emoji or a Hindi/Arabic letter can switch the whole message to Unicode and cut the limit to 70. Count characters, then send a test to yourself on the same phone you care about.
Marketing and OTPs
OTP messages should stay in one segment. Marketing SMS in India and the EU often prices by credits. Paste the final string into the Character Counter including the opt-out line required in your country.
Steps
- Write the SMS without emoji first.
- Count characters with spaces.
- Stay under 160 GSM or 70 Unicode, including legal footer.
Frequently asked questions
Open the Character Counter
The guide is the rule. The tool does the count. No account.
More short guides: all Wordnio guides.