Can't Switch To 4g

[tri wibowo]

i am using rom xiaomi.eu 7.1.19. i have prefer LTE setting but i cannot switch to LTE. every i choose prefer LTE, the setting back again to 3G.
somebody please help me to fix it.

 

[tri wibowo]

is it the bug of ROM?

 

[tri wibowo]

i am using rom xiaomi.eu 7.1.19. i have prefer LTE setting but i cannot switch to LTE. every i choose prefer LTE, the setting back again to 3G.
somebody please help me to fix it.

 

[tri wibowo]

sorry... this is my mistake.
the signal is no problem. the problem because 4G signal in my area was down. now i get 4G signal again.

CASE CLOSED.