I have an obsolete Galaxy S3 GT-i9300 (remember them?) which I now want to use only for playing sound files on a bluetooth speaker. I keep getting the "bluetooth share has stopped" message. Apparently this is a problem that started with Android version 4.3, which is the version mine is on. I would like to go back to an earlier version – any one will do. I have no experience of this and I know I might brick the phone. I read that you can do that with the Odin tool, but I haven’t got an Android version to work with. Can anyone recommend a trusted source, to get an old version? Is there a simper way of reverting to an older Android version?