yep, same thing happened to me today. Phone was working fine, but then I got home and turned on WIFI and it started into this constant boot loop. I can reboot, and hold down the volume down rocker and it goes to some white screen with colored text, reboot, fast boot, reload bootloader etc., but none of those really do anything. Not really sure what is going on? from 1 minute to the next, phone is dead and useless, that seems pretty odd.
Anyone know what the text reboot screen settings can be used for to try and get a reboot to pass. Of course, this puppy isn't backed up, not settings, emails, corporate mails, apps, etc. Bummer, apple certainly has the advantage in this area.
update: whoops, well I guess I chose poorly at the bootloader screen. After several attempts, I chose "clear storage" thinking maybe something on the SD card might have impacted the phone. BOOM, that got me to reboot screen but EVERYTHING is just gone. No nothing, no settings, no email, apps, nothing. What a waste.
At this point, and now for only FUTURE USE. What is the best way to backup settings, email settings, PHONE settings, apps, etc so one can realistically not spend HOURS AND HOURS getting the phone setup again?