In a nutshell, a standalone smartwatch can come in two flavors: with or without a SIM card slot. Without a SIM card, the watch needs to be paired to a smartphone via Bluetooth or Wi-Fi to benefit from an internet connection. However, when fitted with a dedicated SIM card, the standalone smartwatch will turn into a phone and offer the best of the two worlds. It becomes possible to connect to the internet, make calls and even browse the Internet without needing another device.