The transmitting frequency of the wireless router is 2.4GHz frequency. 5GWi-Fi avoids the problem of mutual interference, because this frequency is currently used less. At present, in addition to some flagship phones, most mid - and low-end phones only support 2.4G. Routers that support 2.4G and 5G frequencies are more expensive than routers that only support 2.4G single frequencies, and not many people are currently using them.