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Each SIM has an outbound SMS limit. The default is 100 outbound SMS per SIM, tracked across all installed profiles. SMS limits cannot be removed. Using the REST API, you can lower a SIM’s SMS limit, or raise it back up to the 100 default. Raising the limit above 100 requires an active contract — see How do I request an SMS limit increase? below.

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What happens when a SIM reaches its SMS limit?

When a SIM hits its SMS limit, it is paused until the next billing period, and the organization owner receives an email notification. To resume the SIM sooner, increase its SMS limit; the SIM typically resumes activity within about 10 minutes.

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How do I request an SMS limit increase?

Limited access. Customers with an active contract can request an SMS limit increase by contacting our support team.

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How do I update an SMS limit using the REST API?

You can decrease the SMS limit on a SIM using the REST API, or increase the limit back to 100.
cURL
curl --request POST \
  'https://dashboard.hologram.io/api/1/links/cellular/limit/sms' \
  -u apikey:YOUR_HOLOGRAM_API_KEY \
  --header 'Content-Type: application/json' \
  --data-raw '{
    "linkids": [YOUR_LINK_ID_1, YOUR_LINK_ID_2],
    "limit": YOUR_SMS_LIMIT
  }'