# Service sunset plans (/en/realtime-media/on-premise-recording/reference/sunset)

> For AI agents: see the complete documentation index at [llms.txt](/llms.txt).

This page outlines the service sunset schedule for older versions of the On-Premise Recording SDK. If you are using an affected version, prepare to upgrade in time to avoid service disruptions.

## SDK versions earlier than v4.0.0 [#sdk-versions-earlier-than-v400]

### Retirement schedule [#retirement-schedule]

To support ongoing platform evolution and architectural improvements, Agora is retiring the On-Premise Recording SDK versions 1.x to 3.x. This change does not affect users of version 4.x or later.

The retirement timeline is as follows:

* **Until September 30, 2025**
  Agora will stop releasing new features and remove download access for SDK versions 1.x–3.x.

* **Starting April 1, 2026**
  Technical support and documentation for SDK versions 1.x–3.x will end.

### Upgrade guidance [#upgrade-guidance]

The latest version of the On-Premise Recording SDK includes major improvements in reliability, performance, and security. To avoid service interruption, upgrade as soon as possible using the following resources:

* [Migration guide](/en/realtime-media/on-premise-recording/reference/migration-guide)
* [SDK download links](/sdks?platform=linux)
* [Release notes](/en/realtime-media/on-premise-recording/release-notes)

If you have questions or need help with migration, contact [Agora support](mailto\:support@agora.io).