You will need to have a third party app which can read pdf. And from your email tap hold the file to reveal the drop list asking u what to do with the file, select open with: and it will be save automaticaly within the application u use to open the file. As for saving ringtones, i don't know, if you just want to save them into your phone, evernote or anyother mp3 player might help if u use the same method for the pdf.
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