- For properly opening a PDF file, you must already have a PDF reader (Acrobat Reader, Foxit Mobile PDF, etc. ) installed on your mobile device. Otherwise this will not work
- [It is reported](https://github.com/pwlin/cordova-plugin-file-opener2/issues/2#issuecomment-41295793) that in iOS, you might need to remove `<preference name="iosPersistentFileLocation" value="Library" />` from your `config.xml`