You should receive an email with a download link and password. Open the link on your phone’s web browser (Safari, Chrome, Opera, etc.). The link will not work in a minibrowser within another app like Facebook, Wechat or Twitter. Enter the passcode and click download.
Confirm the installation when prompted. The app will automatically start installing in the background.
Go to Settings > General > Device Management > Mirad,OOO and click “Trust Mirad,OOO. Confirm you trust the app. If you try to access the app before completing this step, iOS will prompt you to trust the app before proceeding.
Now click the PAIYO app icon and you are ready to go.