My device SAMSUNG A35 5G I have faced the problem of Network signal after system update with android 15Like what is the status of Network signal it is not showing

I have purchased of Samsung A35 5G mobile on dated 12th October 2024 from flipkart.But, I have faced several issue in the device like camera, Heating, Battery drain and network and this from day one. This regarding several times visit in the authoriz...