# 14111: Invalid To phone number for Trial mode

Log Level: WARNING

## Description

'To' field must be a validated caller ID while in Trial mode.

### Possible causes

You attempted to send a message or make a call to a phone number that has not been verified on your trial account.

### Possible solutions

* Verify the recipient phone number. See [Verified recipients](/docs/usage/trials#verified-recipients) for details on verifying numbers during trial.
* [Upgrade your account](/docs/usage/trials#upgrade-your-account) to remove this restriction.