If the charger is functioning properly and the phone will not turn on after an hour even with the charger plugged in, I'd bring the phone to an Apple store and have them determine if the battery is just dead, or, if something else is amiss.
It’s crucial that your iPhone device can power on so that you can stay connected to family and friends. Please allow me to assist.
Were you experiencing any problems with your device’s battery life prior to this happening? Has your device recently completed a software update or any new applications recently installed? Please let me know so that I can further assist.
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