Unable to get network mode change settings

[sweet4kishore]

as shown in screenshot I am getting only roaming option but I am not able to get the network mode changing option like 3G or LTE like that there is no options I can select. How to get network selection in iPhone 7 Plus

 

[Tartarus]

-Disable wifi on your iPhone
-Go to Settings > General > Reset > Reset Network Settings and try again.

 

[sweet4kishore]

Tried nothing helped . Did factory reset also no change

 

[Sherry_B]

Tried nothing helped . Did factory reset also no change

Contact your carrier, something may be wonky with your sim.