Whats the difference between 2G,3G and 4G watches?

Whats the difference between 2G,3G and 4G watches?

All around the world, the first generation smart safety devices operated on the 2G network. These included alarms, cell phones etc. However, from around December 2016 a number of network service providers all over the world began shutting down their 2G networks as result of the emerging technologies likes 3G, 4G and now 5G. In…