I can't install the service for buying and loading tickets in an Android phone

The service of loading tickets in the Android phone requires an installation step.

Make sure you have good access to the network, telecom or WIFI and a compatible phone.

If in doubt, you can resume the installation process from the
Customer Service >My purchased transport tickets [...]/I am experiencing problems with the installation after authenticating yourself to your Île-de-France Mobilités Connect account.

The app checks your equipment and guides you step by step.

If the problem persists, an error message will indicate the problem you are experiencing.

In the event that your phone is not compatible to load tickets into the phone, you can probably use your phone to consult and recharge your Navigo pass.