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In #2: "Available updates download automatically if your device is connected to Wi-Fi and a power source."

Besides the best answer already given it's also a convenience.
 
I have my cable hooked up to my PC and I always recharge there.

So I guess I will just update it via I tunes since I have to have it plugged in anyway.
 
How is it a Wireless OTA Over the Air Update if Apple Recommends that you plug your device into a power source before you update ?

http://support.apple.com/kb/HT4623




Wut ? :confused:

Unless plugging in your iphone into a power source somehow gives you Internet access other than Wifi it's still considered a wireless update.

The battery issues that people are reporting are results of bad/corrupted installs. Personally, I'm gettin easily 11 hours of use and 1 day of standby on my iPhone 5.
 
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