An Apple discussion board is on fire with issues regarding iOS 4.3.1 and the fact that it may be causing some iPhone handsets to overheat and suffer short battery life. Many users are saying that battery life on the smartphone has decreased dramatically, and that phones will occasionally overheat while in use.
Here is what the original poster of the thread said:
My iPhone 4 for the last few days has started to get very hot in use and the battery is gone very bad. Leaving the phone on standby can see the battery drain nearly 20% in an hour. This is gone to the stage where I have to turn it off at times just to save battery during the day. It only began to happen when I updated to iOS 4.3. I updated to iOS 4.3.1 yesterday and it still has the same issues. Anyone else having the same problem?
The thread exploded with advice — from disabling Exchange mail accounts to turning off notifications for apps and deleting culprit apps — from several users. Folks, the solution is really much easier than that.
Every time you update your iPhone software and restore it from a backup, there is a chance that there may be some corruption going on from the backed up info. If your iPhone begins to overheat and your battery life goes to the pits after a software update, the fix is easy: restore your Apple smartphone and set it up as new instead of from backup. Sure, it will take much longer to re-sync all of your contacts, apps and music, but it will undoubtedly fix your overheating and battery life issues from an update.
This issue pops up almost every time there is an Apple smartphone software update, and I remember first seeing it after updating my old iPhone 3G to iPhone OS 2.1. I remember the change-log saying that battery life, which was a major issue on the iPhone 3G, was supposed to be significantly improved. Instead, after the update, it became worse! Finally, I learned that a restore as new, instead of restore from backup, fixed the problem. And every single time I’ve had that battery/over-heating issue with iOS updates, I’ve restored my phone from new and the issue always went away.