S21 ultra 5g mobile data not function

[GanFY]

Anyone facing the same problem after upgrade One UI 5.0 with Android 13 last year end update? 

I try reset everything cant solve the problem. Any solutions? 

[SamNoteUser]

Please check the setting: setting - connections - mobile network - network mode.

[GanFY]

Done. Still the same. Even i try to change sim card also the same

[nazzzz]

hv u tried to perform a factory reset? backup your data prior

[GanFY]

Done. Twice. All the same.

[nazzzz]

okay.. u need to send it at the nearest Samsung centre for them to diagnose it. you can schedule an appointment with them at the Support tab in this Samsung Members app