---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/33201#article
headline: "33201: Unauthorized"
url: https://www.twilio.com/docs/api/errors/33201
inLanguage: en
dateModified: 2026-03-11T20:01:16.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 33201: Unauthorized

Log Type: APPLICATION

Log Level: ERROR

## Description

Raised whenever the requested operation is not permitted.

### Possible causes

* Your Account has been suspended and an asynchronous request has been canceled.
* While sending Commands to your SIM, your Command was rejected by its Rate Plan.
* While transferring your SIM to another Account, your request was rejected because the SIM must be `new` and the new Account must either be the requesting Account or a Subaccount of the requesting Account.

### Possible solutions

* While sending a Command, ensure the Rate Plan associated to the given SIM has Commands enabled.
* Contact Twilio Support to help with the SIM transfer.