Please tell us some basic information before asking for help:
Model Name: Rog 5
Firmware Version: 11
Rooted or not: not
Frequency of Occurrence:
APP Name & APP Version (If your issue relates to the app):
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.
I am using Android 11 version. In my area 5g service is started but in Rog 5 device didn't detect 5g network after some R&D I am sharing trick for 5g.
1) phone --> Dial *#*#4636#*#* and select "preferred network type " as "NR"
2) setting -> network and internet ->mobile network ->enable auto 5g and 5g sa mode.
Hope this post help you.