WatchOS smartwatch with 1GHz Dual-Core median processor provides good performance when performing some functions of the Apple Watch 3 Aluminum
With one SIM card slot, the Apple Watch 3 Aluminum allows download up to 150 Mbps for internet browsing, but it also depends on the carrier.
Great connectivity of this device includes Bluetooth 4.2 + A2DP, WiFi 802.11 b/g/n (2.4Ghz) and NFC to make mobile payments or connection to other devices.