The carriers cellular network

With a built-in eSIM module, the Amazfit Nexo lets you register a virtual SIM within the App without the need for a physical SIM card. You'll be able to make phone calls independently through the carrier's cellular network without even having your mobile phone near you, which makes your communication and connection more efficient, and convenient. You can now leave your phone at home while exercising, driving or going out at night, and still be able to make & receive your calls with ease. You can also connect your Bluetooth earphones to your Amazfit Nexo for increased convenience.