Was there some recent update? Last night, I went to power down the phone and this came up on my screen after the phone was powered down. It looked like it was in factory mode and the volume buttons would not let me scroll up and down. I knew that the battery in the phone was only half charged and I was not near a power cord, so I switched out the battery for one that was 100% charged. I turned the phone on and went to check for updates and it showed that the phone was up to date. Then I turned it off and once again, I got this same downloading screen after I had powered the device off. By the time that I woke up, that battery was dead. So now I have the half full battery in there, turned the phone on, checked for updates (device up to date) and then turned it off to see if I would get that screen again, but did not.
Anybody else catch this or know what was downloaded? This is one of those things that if you simply turned your phone off for the night and didn't happen to catch when this downloading screen came up, may never have known that anything was ever updated.