Successfully upgraded my X920bt that had been previously upgraded to 3.0. Did everything as listed on first post and had just 1 issue. It was one of my Micro SD cards wouldn't read. But I think it was because there was a name associated to the card. The 2nd card I had I formated and didn't name the card. That one worked with no issues. Also upgraded the BT Firmware with no issues. It's nice to have Iheartradio!