I have been experience some power issues with my 4S running IOS7. I saw some possible solutions on this forum which I will try. But one problem I am also having that I did not see posted is that my phone will only stay shut down when charging. If it is unplugged and I shut it down, it restarts. I have done a hard re-set, backup and restore and new battery. If anyone has any ideas, I would appreciate it. Thanks