Hello, thank you for taking the time to ask us your question about the Samsung Galaxy Watch8. Yes, you can typically leave your phone at home and answer calls with a Galaxy Watch8 LTE model, as long as you have activated the LTE service on your watch. The LTE version has its own cellular connection, allowing it to function independently of your phone once the service is set up. Please ensure that you carrier categorizes this device as a standalone device to ensure full functionality while your paired smartphone is left behind. If you have any other questions for us or if you would like any further assistance, please feel free to reach out to Support. Thanks for being a valued Samsung customer. - Debra