What are the differences between 2.4GHz Wi-Fi, 5GHz Wi-Fi and 5G mobile network?

2.4GHz and 5GHz are different operation radio frequencies on Wi-Fi. Some major differences:

1. 2.4GHz popular standards: 802.11b/g/n. 5GHz popular standards: 802.11a/n/ac.
2. 2.4GHz has better coverage than 5GHz.
3. 2.4GHz has less RF channels than 5GHz. More interference and congestion happen in 2.4GHz.
4. 2.4GHz normally has less bandwidth/speed than 5GHz.

While the ‘5G’ in ‘5G mobile network’ stands for 5 Generation. It doesn’t stands for a specific radio frequency.

Latency 802.11g/b devices devices force the Wi-Fi router to work at 802.11g/b mode which slow the 802.11n and 802.11ac devices.

It is suggested to isolated the 802.11g/b devices from 802.11ac, or update those devices to support 802.11n or 802.11ac.  

While the ‘5G’ in ‘5G mobile network’ stands for 5 Generation.