I have had a Nokia 521 since May (actually two - suffice to say they don't wash too well!). Both phones have had a similar issue over time, leading me to do a complete reset and installation. The sound from the external speaker suddenly goes to almost no sound at all with any app, including the phone itself and the headphones have a little sound with crackles. The last time this happened I also got a weird error on XBox music that said the music & video app couldn?t find the "media usage rights" for songs to play them so it just kept forwarding from song to song, looking for something to play and finding nothing. I do use earbud headphones (Meelectronics M6 - great phones for the price!), used Spotify to listen to music the first time this happened and now XBox music and the 521 has the amber update. I am also not sure what app I was using before this happened - I think it was spotify the first time and the last time perhaps HERE Drive. Uninstalling/reinstalling apps and restarting the phone didn?t take care of the problem. A hard reset and re-installation does work. Any ideas would be greatly appreciated!