---
page_type: error
code: 21715
message: "21715: Phone Number Does Not Have Correct Messaging Service Capabilities"
level: ERROR
product: Programmable SMS
---

## Description

In order for a phone number to work in a Messaging Service it must have at least SMS or MMS capabilities. If it does not have either, it will fail.

### Possible Causes

- The phone number you are trying to add to the Messaging Service does not have SMS or MMS capabilities.

### Possible Solutions

- The [Active Numbers](https://www.twilio.com/console/phone-numbers/incoming) page in the Twilio Console will display the capabilities of each of the phone numbers in your account.
- Find a new phone number that has SMS and/or MMS capabilities depending on your use case and business needs, and add that phone number to your Messaging Service.