I have been running the beta versions of 8.4 which don't have the music app. Yesterday I went to my admin settings, saw the 8.4 download available and agreed to the terms and conditions.. Since then I have simply 'update requested' showing on my iPhone 6. My iPad updated easily and quickly this morning, but the iPhone stubbornly refuses to advance. Have tried rebooting and that made no difference. Anyone else with this issue and with a solution?