<span style="line-height:1.4em;">Beginning with iOS 8 on the iPhone 4S to the 6+, "Hey, Siri" requires the phone to be plugged in to a power source.</span>
Beginning with iOS 9 on the iPhone 6S, "Hey, Siri" does not require the phone to be plugged in to a power source.
It is the combination of iOS 9 and the upgraded hardware in the iPhone 6S that allow the "Hey, Siri" feature to work without external power.
Using iOS 9 on a phone older than the 6S still requires the phone to be plugged in to a power source.
<span style="line-height:1.4em;">Beginning with iOS 8 on the iPhone 4S to the 6+, "Hey, Siri" requires the phone to be plugged in to a power source.</span>
Beginning with iOS 9 on the iPhone 6S, "Hey, Siri" does not require the phone to be plugged in to a power source.
It is the combination of iOS 9 and the upgraded hardware in the iPhone 6S that allow the "Hey, Siri" feature to work without external power.
Using iOS 9 on a phone older than the 6S still requires the phone to be plugged in to a power source.
Thanks for the explanation - I'm using a 6, so that's obviously why it needs to be plugged in.
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Thanks for the explanation - I'm using a 6, so that's obviously why it needs to be plugged in.