Step 1 : Install InCar App using the Carplayhacks App. This app contains InCar App and you can download the app directly to your iDevice.
Step 2: Click the allow button of the popup as shown in the image below.
Step3: A notification will be displayed as follows, telling you that the profile is Downloaded. Acknowledge it by closing the notification.
Step4: Go to Settings --> General --> Profiles and Device Management.
Step5: At the top , InCar -iOS app will be displayed under Downloaded Profile heading. Click on that.
Step6: InCar iOS profile will open as follows. Click on "Install" to install it.
Step7: Give the correct passcode of your phone.
Step8: Click on "Install".
Step9: Click on "Done" to finish the installation.
Step10: InCar app will be automatically downloaded to your phone. Enjoy it !.