Over the last few days my Bionic has randomly turned off several times. I never see it happen, though. I don't remember installing any new apps recently but I did update some apps. I can't remember which apps I've updated, though. When it is off I can't turn it back on. I have to pull the battery out, put it back in, plug the phone into the charger and the charger into an outlet and only then will the phone turn on. The battery still has a significant charge when this issue happens (for instance, today the battery had a 70% charge when I turned it back on). Any suggestions?