# 21267: Alphanumeric Sender ID cannot be used as the 'From' number on trial accounts

Log Type: APPLICATION

Log Level: ERROR

## Description

This error occurs when you send an SMS from a trial account and use an Alphanumeric Sender ID as the `From` value. Alphanumeric Sender IDs are supported only on paid accounts.

### Possible causes

* Your account is still in trial status.
* Your request uses an Alphanumeric Sender ID as the `From` value.
* Your messaging workflow is configured to send with an Alphanumeric Sender ID before the account has been upgraded.

### Possible solutions

* Upgrade your account before sending with an Alphanumeric Sender ID.
* Until you upgrade, send messages from an SMS-capable Twilio phone number in your account instead of an Alphanumeric Sender ID.
* After you upgrade, enable Alphanumeric Sender ID in your messaging settings and add the sender to your Messaging Service.
* If you continue with an Alphanumeric Sender ID after upgrading, confirm that the destination country supports it and complete preregistration when required.

#### Additional resources

* [Get started with your Twilio free trial account](/docs/usage/tutorials/how-to-use-your-free-trial-account)
* [Twilio Free Trial Limitations](https://help.twilio.com/articles/360036052753-Twilio-Free-Trial-Limitations)
* [Alphanumeric Sender IDs in Messaging Services](/docs/messaging/services/alphanumeric-sender-ids-in-messaging-services)