If you are like most people, you probably use a PDF reader to read and save PDF files. But there are a few ways to delete pdf files on Android phone. The first way is to open the file manager and select the file you want to delete. Then press the Delete button. The file will be deleted and your Android phone will show an error message. The second way is to use the File Manager app from the Google Play store. This app has a list of all the files in your phone. Select one of the files and press the Delete button. The file will be deleted and your Android phone will show an error message. The third way is to use a third-party app such as Adobe Acrobat Reader or Microsoft Word. These apps have their own ways of deleting pdf files, but they all have some drawbacks that we’ll mention here: Adobe Acrobat Reader can’t handle large pdf files, Microsoft Word can’t open many pdf files, and some third-party apps can’t work with certain types of PDFs (for example, if you try to delete a document that’s encrypted).