Before you start, make sure you have the certificate file (usually ending in .crt , .cer , or .pem ) downloaded to your phone's internal storage. Go to Settings > Security & Privacy .
A WiFi certificate acts as a "digital license" for your phone. Instead of sharing a password, your phone presents a unique, encrypted certificate to the network’s authentication server (RADIUS) to prove you are an authorized user. Why Use Certificates Over Passwords? wifi certificate android
"Okay! Everyone with an Android device, listen carefully. This is the gauntlet." Before you start, make sure you have the