> For the complete documentation index, see [llms.txt](https://support.portsip.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.portsip.com/portsip-communications-solution/configuring-sip-trunks/sinch-sip-trunk/purchase-a-did-on-telnyx-platform.md).

# Purchase a DID on Sinch Platform

Before placing or receiving calls, you must have at least one active DID (phone number) on your Sinch account.\
If you already have one or more active DIDs, you may skip this section.

### Purchase a DID on the Sinch Platform

Follow the steps below to purchase a DID with SMS/MMS enabled.

**Step 1: Sign In to the Sinch Customer Portal**

1. Log in to the [Sinch customer portal](https://dashboard.sinch.com/dashboard) using your account credentials.
2. From the left-hand navigation menu, go to: **Numbers > Get visual numbers**
3. Search and buy a virtual number that supports SMS on the right of the page.

***

### Next Steps

Once the DID numbers are available, proceed with one of the following guides to configure the Telnyx trunk in PortSIP PBX:

* [Configuring Telnyx IP Authentication Trunk](/portsip-communications-solution/configuring-sip-trunks/telnyx-sip-trunk/configuring-telnyx-ip-authentication-trunk.md)
* [Configuring Telnyx Register Authentication Trunk](/portsip-communications-solution/configuring-sip-trunks/telnyx-sip-trunk/configuring-telnyx-register-authentication-trunk.md)