Use this app, it is not avaliable in play Store
Open it then go to ( Set preferred network type ) and select LTE Only
You mean I am using December version, so I can not use CSC method?
And my only choice now is using DR.ketan rom?
Yes, you can not use CSC method
If you want to root official firmware just install TWRP, format data and root, then wait ...
My note 8 is from Vietnam with XXV CSC. I tried to root my Note 8 with following steps and failed:
1. Using Odin to flash Rom from Vietnam Rom to Australia Rom (XSA, because I can't find your CSC for XXV), December version
2. Wait fo...
Here is an online petition to sign: https://www.ipetitions.com/petition/note-8-oem-unlock-4-all