Before downloading the certificate to your Android device, you must enable remote connections on your host computer. Fiddler Everywhere Capturing Android Traffic - Telerik.com
To capture and decrypt HTTPS traffic from an Android device using Fiddler , you must install the Fiddler Root Certificate as a trusted User CA. This process allows Fiddler to act as a "man-in-the-middle" for secure connections. download fiddler certificate for android