Ethernet connection on Verizon 2.4GHz and 5GHz. How do I change 2.4GHZ up to my 5GHz network speed?

[#1]

My existing Verizon FIOS connection internet as 2.4GHz and is too slow and bogs down way to much.  How do I change my existing SLOW 2.4GHZ network connection up to my other higher 5GHz network speed?

I know I paid for the 2 higher speeds and need to decrease the "spining circle" slow downs?

[#2]

Which router do you have currently? Also, what devices are you generally using? Moving to 5Ghz would require both router and device support.

[#3]

It is the new 2.4GHz/5.0GHz Router with 10/100/1000 speed.  Wifi 5 GHz = FIOS-88cx-5G is in the manual for 5.0 GHz part of the 2.4GHz / 5.0GHz Router I rented from Verizon.

Thanks.

[#4]

As my friend stated both the router and devices must be capable of connecting at 5 GHz. The router is capable of the connection. But is the device? You can see if it is when attempting to connect the device. It will list 2.4 & 5 GHz connections. You then click on the faster 5 GHz and you should connect. If your device does not show 5 GHz then you cannot connect at the higher speed.