---
title: "Unable to Activate Desk Phone After Upgrading to X Series"
slug: "unable-to-activate-desk-phone-after-upgrading-to-x-series"
updated: 2026-04-21T11:00:43Z
published: 2026-05-21T21:25:23Z
canonical: "help.8x8.com/unable-to-activate-desk-phone-after-upgrading-to-x-series"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.8x8.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Unable to Activate Desk Phone After Upgrading to X Series

## Symptom

Desk phone does not activate after upgrading to X Series.

## Applies To

- Phones
- Admin Console

## Resolution

If a desk phone does not activate after upgrading, it is likely not supported in Admin Console. A list of physical devices that are not supported in Admin Console can be found below. These devices were included in the X Series upgrade, but are not supported in Admin Console.

### Known Issues and Restrictions

These devices have the following restrictions:

- The device cannot be edited after the upgrade.
- The device cannot be added back to the account if removed after the upgrade.
- These will not be listed on the Devices page.
- If **any changes are made to the user profile** that is assigned to the unsupported device it **will result in the device not working or changes not saving correctly, and the device will need to be replaced.**
- You will not be able to swap the unsupported device with a supported device. **A new user profile will have to be createdto activate the new device**, and the old user profile can be deleted.
- To replace the device, **contact your Sales Representative** to get more information on a new device.

### Unsupported Devices

| **Device Make** | **Not Supported Models** |
| --- | --- |
| #### Aastra Phones | - Aastra IP 6755i Deskphone - VO IP Phone - 6739i - VO IP Phone - 6753i - VO IP Phone - 6757i CT |
| #### Cisco | - SPA 122 |
| #### MGCP Devices | - 8x8 BPA430 - Business Phone and Adapter - Broadband Phone Adapter 430 - Business Phone Adapter 410 - BPA 430 Trunking Fax - Uniden 160P - Uniden 165P - Video Phone Tango - Virtual Office BPA410 - VO Fanstel and BPA410 - VO Fanstel and BPA430 - VO Fanstel & Tango, Silver - VO Fanstel & Tango, White - VO Fanstel & Tango, Black - VO VTA464 Tango Adapter, Black - Miscellaneous Equipment |
| #### Poly | - Poly Kirk 5020 Handset Bundle - Poly Kirk KWS 300 Base Bundle - Poly Kirk KWS 300 Base (PoE) - Poly HDX 4000 - Poly HDX 4001 - Poly HDX 6000 - Poly HDX 7000 - Poly HDX 8000 - Poly HDX 9000 - Poly VVX 1500D |
| #### Spectralink | - Spectralink IP-DECT Server KW300 - Spectralink 7520 Handset Bundle |
| #### Yealink | - Yealink CP960 Conference Phone (PoE) - Yealink T21p SIP Phone w/acps |

## Additional Information

A list of **supported devices** on Admin Console can be found [here](https://www.8x8.com/communications-solutions/equipment/compatible-equipment).