S21 Ultra slow 4G

Make sure you’re properly inserting the SIM card and confirm that your cellular data is enabled . Resetting your network settings in your device will refresh your connection which will improve your service. Using your Samsung Galaxy S21, go to: Settings>General Management>Reset>Reset network settings.

If your Galaxy S21 still drops the Wi-Fi signal or still keeps disconnecting frequently, then you have to reset the network services on your phone . Assuming that such a problem doesn’t occur to your other devices, then it’s probably just a minor issue with some of the wireless settings on your device.

Problem: Reduced camera performance and lag zooming or switching between modes . It seems like reduced camera performance was an issue for many Samsung Galaxy S21, S21+, and S21 Ultra users out of the box, and for some users after a recent update — although the problem doesn’t seem to have affected everyone.14 Mar 2022