Configure Fiddler
Click Tools > Fiddler Options > Connections.
Ensure that, the checkbox is checked for remote computers to connect .
If You check the box, restart Fiddler.
Hover over the Online indicator at the "right" of the Fiddler toolbar to display the IP address of the Fiddler Server.
Configure Nexus Device
Swipe down from the top of the screen and tap the Settings icon.
Tap Wi-Fi.
Tap and hold your The current Wi-Fi network. Select Modify Network.
Tap the Show advanced options box.
Tap the Proxy settings dropdown and select Manual.
Type the IP address and port (usually 8888) of the Fiddler server.
Tap Save.
To verify the configuration, go to http://ipv4.fiddler:8888/. Chrome should display the Fiddler Echo Service webpage, and the traffic should appear in Fiddler.
Disable the Proxy
After using Fiddler, return to the proxy Settings -screen above and remove the proxy.
Decrypt HTTPS
On the Fiddler Echo Service webpage, click the fiddlerroot Certificate link.
If the download doesn ' t open automatically, swipe down from the top and tap the Settings icon.
Tap Personal > Security.
Under credential Storage, tap Install from Storage.
Tap the fiddlerroot.cer file.
(Optional) Type a name for the certificate.
To verify this configuration, tap Trusted credentials > User. This should display the Fiddler certificate.
Disable HTTPS Decryption
To delete the Fiddlerroot certificate, tap Trusted credentials > User and delete the certificate.
Android phone using fiddler capture HTTPS message method