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Use the lab to see how Phonovation encodes and divides your message before you send it. Everything runs in your browser, and the lab never submits an API request.

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Rules represented by the lab

  • Message length from 1 to 2,000 characters with at least one visible character.
  • GSM-7 limits of 160 units for one part and 153 units per concatenated part.
  • UTF-16 limits of 70 characters for one part and 67 characters per concatenated part.
  • GSM-7 extended characters count as two units.
  • Typographic quote, dash, ellipsis, and bullet replacements from the OpenAPI contract.
Each SMS part may be billed separately. The lab calculates message composition only; it does not check account permissions, credits, Sender ID provisioning, recipient deliverability, or consent.

Sending SMS

Add the calculated text to a campaign and review Sender IDs, recipients, scheduling, summaries, and delivery behavior.