General availability: Azure Sphere OS version 21.06 expected on June 23

The 21.06 Azure Sphere OS quality update is now available for evaluation in the Retail Eval feed. The retail evaluation period provides 14 days for backwards compatibility testing. During this time, please verify that your applications and devices operate properly with this release before it is deployed broadly via the Retail feed. The Retail feed will continue to deliver OS version 21.04 until we publish 21.06 in two weeks. Note: there was no 21.05 update.

This evaluation release of 21.06 includes enhancements and bug fixes for the OS only; it does not include an updated SDK.

Areas of special focus for compatibility testing with the 21.06 release include:

• Apps and functionality utilizing SPI Flash.  
• Apps and functionality utilizing wolfSSL.

For more information on Azure Sphere OS feeds and setting up an evaluation device group, see Azure Sphere OS feeds and Set up devices for OS evaluation.

For self-help technical inquiries, please visit Microsoft Q&A or Stack Overflow. If you require technical support and have a support plan, please submit a support ticket in Microsoft Azure Support or work with your Microsoft Technical Account Manager. If you would like to purchase a support plan, please explore the Azure support plans.