# Zoom Video SDK session is returning null Dial-in numbers,

**URL:** <https://devforum.zoom.us/t/zoom-video-sdk-session-is-returning-null-dial-in-numbers/146629>\
**Category:** Web\
**Tags:** phone, api, video-sdk\
**Created:** [September 21, 2026, 7:32am UTC](https://devforum.zoom.us/t/zoom-video-sdk-session-is-returning-null-dial-in-numbers/146629 "2026-09-21T07:32:46Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![Rajat02](https://avatars.discourse-cdn.com/v4/letter/r/b77776/32.png) [@Rajat02](https://devforum.zoom.us/u/Rajat02)\
**Post date:** [September 21, 2026, 7:32am UTC](https://devforum.zoom.us/t/zoom-video-sdk-session-is-returning-null-dial-in-numbers/146629/1 "2026-09-21T07:32:46Z")

</div>

### Zoom Video SDK is returning null for isSupportPhoneFeature() although Audio confrence pack is added in account.

**PROBLEM DESCRIPTION**  
We are building PSTN dial-in into Video SDK sessions so a third party can join a live session by phone. Zoom is not returning any dial-in information — neither via REST nor via the client SDK — even though the Audio Conferencing plan is active on the account.

**REPRODUCTION (REST)**

```auto
Request:
POST https://api.zoom.us/v2/videosdk/sessions
Authorization: Bearer <JWT signed with Video SDK API Key/Secret>
Body: { "session_name": "59b6223e-9247-46d3-b11d-a9a8b4e7cf14" }

Actual response (200):
{
"session_id": "x3fb28ysSSS6xZMOqnDboQ==",
"session_number": 83741550246,
"session_name": "59b6223e-9247-46d3-b11d-a9a8b4e7cf14",
"created_at": "2026-09-21T05:42:00Z",
"settings": { "auto_recording": "none" }
}

```

Expected, per document provided by zoom: **Phone (PSTN) - Video SDK - Zoom Developer Docs**`settings.global_dial_in_numbers` (and a session passcode) so the session can be joined by phone. The settings object contains only auto\_recording. GET /v2/videosdk/sessions/{sessionId} for the same session also returns no dial-in block.

**REPRODUCTION (CLIENT SDK)**  
On the same session, after join: stream.isSupportPhoneFeature() → false & stream.getCurrentSessionCallinInfo() → null

**Q:** Is any additional account-level configuration required to provision dial-in for Video SDK sessions beyond purchasing Audio Conferencing?  
**Q:** If dial-in is provisioned, does a session created without a passcode accept dial-in callers, and what is the correct DTMF prompt sequence (session\_number# … #)?

---

<div class="post-metadata">

**Author:** ![vic.yang](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/vic.yang/32/24656_2.png) [@vic.yang](https://devforum.zoom.us/u/vic.yang)\
**Post date:** [September 22, 2026, 6:03am UTC](https://devforum.zoom.us/t/zoom-video-sdk-session-is-returning-null-dial-in-numbers/146629/2 "2026-09-22T06:03:38Z")

</div>

Hey @Rajat02

Thanks for your feedback.

@chunsiong.zoom Could you help with this? It looks like the account plan doesn’t include the Audio Conference plan.

Thanks  
Vic

---

<div class="post-metadata">

**Author:** ![Rajat02](https://avatars.discourse-cdn.com/v4/letter/r/b77776/32.png) [@Rajat02](https://devforum.zoom.us/u/Rajat02)\
**Post date:** [September 22, 2026, 8:49am UTC](https://devforum.zoom.us/t/zoom-video-sdk-session-is-returning-null-dial-in-numbers/146629/3 "2026-09-22T08:49:51Z")

</div>

Hi @vic.yang I have reached out to support team and I have recived this response:

“Our Technical Support team assists with product-level defects. We have confirmed this issue is configuration-related and not within the scope of your account’s Developer Support Plan, as such this case will be closed.”

Is there any specific config to link Audio Confrencing with Zoom Video SDK? Am I missing any thing here? Just to confirm Audio Conference I rechecked. It’s available in the account being used.

Thanks,  
Rajat

---

<div class="post-metadata">

**Author:** ![chunsiong.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/chunsiong.zoom/32/35488_2.png) [@chunsiong.zoom](https://devforum.zoom.us/u/chunsiong.zoom)\
**Post date:** [September 23, 2026, 2:42am UTC](https://devforum.zoom.us/t/zoom-video-sdk-session-is-returning-null-dial-in-numbers/146629/4 "2026-09-23T02:42:58Z")

</div>

@vic.yang I’ve just checked, there is audio conferencing plan enabled on the account

---

<div class="post-metadata">

**Author:** ![Sophia78](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/sophia78/32/51763_2.png) [@Sophia78](https://devforum.zoom.us/u/Sophia78)\
**Post date:** [September 26, 2026, 2:55am UTC](https://devforum.zoom.us/t/zoom-video-sdk-session-is-returning-null-dial-in-numbers/146629/5 "2026-09-26T02:55:50Z")

</div>

Since Chun Siong confirmed Audio Conferencing is enabled, the next step is probably checking the Video SDK account configuration or provisioning for PSTN.

---

<div class="post-metadata">

**Author:** ![Rajat02](https://avatars.discourse-cdn.com/v4/letter/r/b77776/32.png) [@Rajat02](https://devforum.zoom.us/u/Rajat02)\
**Post date:** [November 6, 2026, 5:49am UTC](https://devforum.zoom.us/t/zoom-video-sdk-session-is-returning-null-dial-in-numbers/146629/6 "2026-11-06T05:49:57Z")

</div>

This issue is resolved. Provisioning was done by the Zoom backend to fix it. Thanks everyone here for your responses.