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

Log Type: APPLICATION

Log Level: ERROR

## Description

You attempted to send an SMS from a Trial Account using an Alphanumeric Sender ID as the `From` parameter.

### Possible causes

You are trying to use an Alphanumeric Sender ID on a Trial Account. Trial accounts [cannot send from Alphanumeric Sender IDs](/docs/usage/tutorials/how-to-use-your-free-trial-account#sending-sms-and-mms-messages)

### Possible solutions

If you are using an Alphanumeric Sender ID on a Trial Account, [upgrade your account](/docs/usage/tutorials/how-to-use-your-free-trial-account#how-to-upgrade-your-account).