1. Run dial - press 319712358.
if you accurately press hidden menu will be open
2. Passwords:
SKT - 996412
KT - 774632
LG U+ - 0821
3. If a password is entered correctly, you will see the various menus.
Network Setting, Videocall Setting, SMS Setting ...etc
Network Setting can set multiple networks. (GSM, WCDMA , LTE (Lte for korea)
About Author
Malitha Manawaduge
Do you actually need a custom ROM for your Android device. Do got really don’t that ya it is time to ditch the stock android ROM and move on while replacing it with newer and better custom ROMs.