Samsung galaxy a12 won't be able to get 4g..

[basa]

It connects to wifi. But I can't get 4g when we outside. When I turn on the mobile data it gives me just E signal...however it was working fine before I upgraded or updated the phone..

Is anyone suffering from the same problem?

Do you have any idea to fix it?

I have tried many different solutions and I still have the same issue 

Thanks 

[An3ie7]

Hey, i have a question. My samsung Galaxy a14 5g doesn't have the camera app, and I keep looking in setting, and nothing shows up .