# 10004: Call concurrency limit exceeded

Log Type: TWILIO

Log Level: ERROR

## Description

### Call concurrency limit exceeded

The call was rejected because you reached the maximum limit of concurrent calls available for your account.

### Possible causes

* Trial accounts and newly upgraded accounts without an approved Primary Customer Profile have limited concurrent calls.
* Your account has reached other Twilio defined concurrency limits.

### Possible solutions

* [Upgrade your account](/docs/usage/tutorials/how-to-use-your-free-trial-account#how-to-upgrade-your-account) and [create a Primary Business Profile](/docs/trust-hub/trusthub-rest-api/console-create-a-primary-customer-profile) to remove concurrent call limitations.
* Reach out to your Twilio account team or Twilio support to request additional capacity.