Google has officially phased out software and cloud support for very early legacy hardware models, specifically the 1st generation Google Nest Learning Thermostat and the original Nest Protect smoke detectors manufactured prior to 2015. These legacy units have exceeded their operational lifecycle and can no longer connect to modern mobile app servers or receive security updates. However, 2nd, 3rd, and 4th generation models remain fully supported. Verification: Check the official Google Nest support lifecycle documentation to verify current software compatibility for your specific device model.
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