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www.zdnet.com]
Both handsets were bought at the same time (direct from Apple for delivery on launch day), both are connected to the same network (AT&T) and both handsets are now running iOS 5.0.1. This to me was strong evidence to suggest that the problem affecting iPhone handsets was not a hardware issue. However, so that we could totally rule out this being a hardware problem the developer took things a step further. He factory reset both handsets and then recovered then from a backup. However, rather than reloading them with their original backup, he swapped them over. He reloading his day-to-day handset with the backup from his development handset, and loaded the development handset with the backup from his regular day-to-day handset.
Would the battery problem stay with a specific handset or swap over with the software?
The problem jumped handsets. Now the handset that was his development test bed (but loaded with the apps and settings from his day-to-day handset) is displaying the battery drain problem. The other handset (the one that was displaying the problem), is showing excellent battery life.