On Android N or higher, ad calls are visible in Charles proxy only when the following steps are performed: 1. Install Charles SSL certificate on your device, and set up proxy. 2. Enable SSL Proxy for your mobile app. ## Install Charles SSL certificate on your device, and set up proxy To use Charles as a proxy for your app, download and [install Charles](https://www.charlesproxy.com/documentation/installation/) on your computer. To save the certificate as a `.pem` or `.cer` file, select **Help \> SSL Proxying \> Save Charles Root Certificate** . To install the certificate on your device, follow the prompts in **Help \> SSL Proxying**.  If you use an [Android emulator with a proxy](https://developer.android.com/studio/run/emulator-networking#proxy), set the proxy address to `http://127.0.0.1`. Set the port to the value shown in Charles from **Proxy \> Proxy Settings**. If you use a physical device, connect the device to the same Wi-Fi network as your computer. To set up the proxy, open your device's advanced network settings. For details, see [Connect to Wi-Fi networks on your Pixel phone](https://support.google.com/pixelphone/answer/2819519). In Charles, select **Help \> Local IP Address** to find your IP address. On your device, enter the IP address from Charles and the Charles port as the proxy. ## Enable SSL proxy for your mobile app For Charles to intercept your mobile app's SSL traffic, declare that your app can trust an SSL certificate. You can trust a user-installed certificate or embed the Charles certificate as a raw resource in your app. For example, you can save the certificate in your `res/raw/charles_cert.pem` file. First, add a new XML resource file for [Network Security Configuration](https://developer.android.com/training/articles/security-config) in your `res/xml/network_security_config.xml` file: ```xml ```  Next, update the `AndroidManifest.xml` file to use the network security configuration. ```xml ... ```  After that, you can launch the mobile app and look for ad requests in the Charles log.