Hello @Artiom Ivashinnikov
Can you check in Settings, Connections, Mobile Networks and see if 4G is still chosen.
If it is then if your not getting a 4G connection anywhere you visit then go into Settings , General Management, Reset and Reset Network connection.
If that does not help then as a process of elimination try your sim card in another phone and if possible another sim in your phone and see what happens.
You also have a diagnostic tool in your Samsung Members app.
Have a word with your network customer service to check your account is set upcorrectly.for 4G.
If I can be of any further help then please don't hesitate. Take care. 😎
Daily Driver > Samsung Galaxy s²³ Ultra 512Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "
