---
title: "Which third-party phones are compatible with 8x8 Services?"
slug: "which-third-party-phones-are-compatible-with-8x8-services"
updated: 2026-05-11T10:44:49Z
published: 2026-05-21T21:28:43Z
canonical: "help.8x8.com/which-third-party-phones-are-compatible-with-8x8-services"
---

> ## 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.

# Which third-party phones are compatible with 8x8 Services?

## Question

Which third-party phones are compatible with 8x8 serivces?

## Applies To

- Third-Party Devices

## Answer

Compatibility for 8x8 services with phones purchased through a third-party depends heavily on whether a factory-installed device certificate is present. See [How to Check Phone for a Valid Device Certificate](/support/docs/how-to-check-phone-for-a-valid-device-certificate).

See the [8x8 Compatibility Matrix](https://www.8x8.com/products/devices/compatibility) for a list of third-party devices that work with 8x8 services. In the case of Cisco and Poly phones brought over from a different service, which are supported and have a valid factory-installed device certificate, be sure to factory reset the phone before provisioning.

## Additional Information

- Some Cisco phones will need to be flashed to OpenSIPS if they come from a Cisco Call Manger deployment. See [Provision Cisco 3PCC Phones for VoIP Service](/support/docs/provision-cisco-3pcc-phones-for-voip-service).
- Any device not found in the 8x8 Compatibility Matrix and or the third-party source will be a third-party device.

> [!NOTE]
> *Note:*
> 
> *Accommodation of devices not purchased from or originally provisioned for service by 8x8 is on a commercially reasonable effort basis. These devices are not guaranteed to be supported on 8x8 service. Equipment supplied by 8x8 has been pre-configured and updated with software to support 8x8 service and 8x8 secure service activation.*