To use the DiscoverEU Interrail FLEX Pass, you will need to download the Railplanner App on your smartphone. The minimum system requirements are Android 6.0 and up, or iOS 13.0 or later. If you own a Huawei phone and can't download the app in your regular app store, please contact us for further instructions.
If your phone runs a software version lower than those specified above, I'm afraid you will not be able to use the FLEX ticket. Instead, please get in touch to see if a FIX travel option might be better suited for you.