Update README.md

README.md

@@ -69,6 +69,8 @@ For an M1 Mac, read this [SO](https://stackoverflow.com/questions/64901180/how-t
 * To run a on a **Development Simulator**: `npm run ios`
 * Changes applied to Javascript will be applied automatically, any changes to native code will require a recompile
 
+If you want to run the app on an actual physical iOS device, please follow the instructions [here](https://github.com/Expensify/App/blob/docs/how-to-build-app-on-physcial-device/contributingGuides/HOW_TO_BUILD_APP_ON_PHYSICAL_IOS_DEVICE.md).
+
 ## Running the Android app 🤖
 * Before installing Android dependencies, you need to obtain a token from Mapbox to download their SDKs. Please run `npm run configure-mapbox` and follow the instructions. If you already did this step for iOS, there is no need to repeat this step.
 * Go through the official React-Native instructions on [this page](https://reactnative.dev/docs/environment-setup?guide=native&platform=android) to start running the app on android.