I am using A03S and trying to connect to the internet. Actually, it is working fine with mobile but returning DNS error while connected on WiFi. This happened suddenly when I modified the network settings and I could not revert back to the default settings. The WiFi is working properly on other devices.
I was having a similar problem few months ago and I was able to fix it by flushing DNS cache. If you are using Chrome Browser, execute this in the address bar: chrome://net-internals/#dns
Now, tap on "clear host cache". After that, you can try clearing cache of other browsers and applications as well.
Moreover, open WiFi settings on your Samsung device and tap on the connected network. Then select "Modify WiFi Settings". After that, scroll and find "IP Settings". Check if that is set to "Static". If that is set to "Static", tap on it and switch to "DHCP" and update the settings. This will most probably reset your DNS settings to default regardless of any samsung model you might be using.
I was having a similar problem few months ago and I was able to fix it by flushing DNS cache. If you are using Chrome Browser, execute this in the address bar: chrome://net-internals/#dns
Now, tap on "clear host cache". After that, you can try clearing cache of other browsers and applications as well.
Moreover, open WiFi settings on your Samsung device and tap on the connected network. Then select "Modify WiFi Settings". After that, scroll and find "IP Settings". Check if that is set to "Static". If that is set to "Static", tap on it and switch to "DHCP" and update the settings. This will most probably reset your DNS settings to default regardless of any samsung model you might be using.
