Google is working on upgrading the mobile Assistant devices to Gemini. Google says it will continue its work to upgrade Assistant users to Gemini on mobile devices into 2026. The company did not reveal an exact date for the transition. In March this year, Google announced plans to upgrade Assistant to Gemini on most mobile devices by the end of 2025.Google is working on upgrading the mobile Assistant devices to Gemini. Google says it will continue its work to upgrade Assistant users to Gemini on mobile devices into 2026. The company did not reveal an exact date for the transition. In March this year, Google announced plans to upgrade Assistant to Gemini on most mobile devices by the end of 2025.