I just got an iPhone 5 replacement from Apple due to a screen issue but I've noticed my device is constantly getting hot and freezing a whole lot, I downloaded SysStats and according to that app my CPU is consistently running above 60% average and that's without even adding more than half of the apps I used (restored as new iPhone) I remember the CPU running at an average 5%-10% on my original device. I already went back to the Apple store and have told me it's not a hardware issue but a rogue app(s) I find this hard to believe and I feel it has something to do with iCloud (again, restored with a new iCloud backup) any suggestions?