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A2PCheck

Twilio Error 30019: Content Size Exceeds Carrier Limit

Error 30019 is a size failure: the message (often after Unicode encoding blows up the segment count) is larger than the carrier will transmit.

Guidance only — A2PCheck is independent and not affiliated with Twilio, The Campaign Registry, or any carrier, and we can't guarantee approval.

What Twilio error 30019 means

The message failed because the size of its content exceeded the carrier's limit. The message is simply too large for the carrier to transmit as sent.

Official Twilio name: 30019: Content Size Exceeds Carrier Limit

Why error 30019 happens

Too many characters or bytes in the body, or UCS-2 (Unicode) encoding — triggered by emojis, curly quotes, or special glyphs — which carries a much lower per-segment character limit than GSM-7. A message that looks short can still exceed limits once encoded as Unicode.

How to fix error 30019

  1. Reduce the message content to stay within SMS/MMS size limits.
  2. Check the body for Unicode characters (emojis, smart quotes, special glyphs) that force UCS-2 encoding and shrink the limit.
  3. Enable Smart Encoding on the Messaging Service to convert common Unicode characters to GSM-7 equivalents.
  4. Split genuinely long content into fewer, tighter messages rather than one oversized send.

Related error codes

Twilio error 30007: Message FilteredCarrier filtering & content blocksTwilio error 30004: Message BlockedCarrier filtering & content blocks

Official reference

For the authoritative definition and any changes to this code, see the Twilioerror catalog. A2PCheck is an independent pre-scan layer for the campaign packet you submit — it can't change carrier behavior.

Twilio error 30019 documentation

Frequently asked questions

Why does 30019 fire on a short message?

A single emoji or curly quote forces the whole message into UCS-2 (Unicode) encoding, which caps each segment near 70 characters instead of 160. That can push a seemingly short message over the carrier's size limit. Strip the Unicode or enable Smart Encoding.

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01

Campaign Info

Basic details about your messaging campaign.

0 characters — Too short — describe who opts in, what you send, and how often.

02

Sample Messages

Provide at least 2 example messages you'll send.

STOP foundHELP foundchecked across your keywords & messages
03

Opt-In / Message Flow

How users consent to receive your messages.

Consent evidence readiness

Describe where and how subscribers consent — name the opt-in location and the consent language they agree to.

  • Name the opt-in location (web form, checkout, keyword, QR code, paper form, etc.).
  • Spell out the consent language — what the subscriber explicitly agrees to.
  • State the message frequency (e.g. recurring, varies, msgs/month).
  • Include a "Message and data rates may apply" disclosure.
  • Link a privacy policy describing how you handle subscriber data.
  • Clarify that consent isn't a condition of purchase, where that applies.
  • Capture and retain opt-in evidence (timestamp, source URL, exact consent text/screenshot) for each subscriber.

Guidance only — consent requirements can vary by use case and jurisdiction.

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