*NOTE* Remember whenever navigating through the menus that the android back button on your device will automatically exit you back to the dialer. To go back, you must use the 3 dots menu at the top and select Back.
To enable all the LTE Bands go to:
1-Option 2-UE Setting and Info
2-Option 1-Setting
3-Option 2-System
4-Option 9-Next Page
5-Option 9-Next Page
6-Option 9-Next Page
7-Option 9-Next Page
8-Option 1-Set LTE Band Config
9-Option 1-Set Default LTE Band
This should enable all the LTE Bands for the country that the firmware installed is from and the available roaming bands that are set in the firmware.
For the 5G Bands go back (using the 3 dots in the top) until you see UE setting menu and the 2 options for Protocol and System then:
1-Option 1-Protocol
2-Option 9-NR5G
4-Option 3-NR5G Prune Status
Here you will see a [1] Remove NR5G PRUNE option as the last line. Select that option. If you visit this menu later, it will show a * next to NR5G PRUNE is Removed and the option will change to [1] Restore NR5G PRUNE, in case you want to go back.
Enable DSS
Now that all the bands are enabled, you have to enable the DSS setting. Get back to UE SETTING MENU with Protocol and System options and:
1-Option 1-Protocol
2-Option 1-AS
3-Option 9-Next Page
4-Option 9-Next Page
5-Option 2-NR DSS CONTROL
6-Option 1-NR DSS ENABLE
Just reboot the phone after this and this should be all that is needed to enable all LTE and 5G Bands and DSS!