Connectivity
Interestingly, the Cubot C20 Pro does not support cellular connectivity, including 2G, 3G, or 4G bands, dedicating its functions completely to health and fitness tracking with no support for traditional smartphone communication features. It lacks WLAN and USB interfaces, focusing its competency on Bluetooth 5.0 with A2DP for optimized wireless communication with other devices like smartphones. This limitation suggests the C20 Pro is meant to be a complementary device rather than a standalone communication gadget.