In order to recover your Eidoo wallet (in case you have changed or lost your device), you need to be in possession of the backup phrase (12 words).
Reinstall the application. At a certain point, during the configuration process, you will be asked to Create a new wallet or Restore an existing one.
Choose the Restore option, then insert the 12 words. Your wallet and assets will be available again.
We have also created a video tutorial for you.