Skip to main content
Unable to Activate Cisco 504G and 303 Phones
8x8 Support

Unable to Activate Cisco 504G and 303 Phones


Can't activate Cisco 504G and 303 Phones due to firmware not compatible with the new Certificate.

Applies To

  • Cisco 504G and 303 Phones


Upgrade firmware to 7.5.7 by following these steps:

  1. Download the Firmware Tool from Cisco.
  2. Extract and run file spa50x-30x-7-5-7.exe.
  3. Enter the IP Address of the phone and follow the prompts to complete the upgrade.
    Firmware Upgrade Tool.png
  4. After upgrade, try activating the phone again.
  5. If phone is not yet provisioned, follow the steps on this article.


The certificate for legacy Cisco phones has expired and unfortunately the new Certificate is not compatible with f/w 7.5.2b.

Additional Information

If the Cisco link is inaccessible a back up of the Cisco tool can be downloaded here

For Cisco phones that have already been activated and are online, no action is necessary

After updating and re-provisioning, phones may take up to 5 minutes to respond.

  • Was this article helpful?