---
page_type: error
code: 33201
message: "33201: Unauthorized"
level: ERROR
product: Programmable Wireless
---

## 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.