I've had my iPhone 5 for a month. It randomly freezes/locks up while I'm using it. It's happened about 3 or 4 times in the past two weeks. The second time, it unfroze by itself after a minute. Every other time I have had to hold the power and home buttons. I did a restore yesterday, hoping to fix my battery problems (battery was great for the first two weeks, and now it's horrible.) Even after the restore, it froze up this morning. Has anyone else experienced this issue?