Samsung Galaxy S III User Manual page 17

3. Plug the AC adapter into an electrical outlet and charge your battery. Fully charging a
battery may take up to three hours.
Note: Your phone's battery should have enough charge for the phone to turn on and find a
signal, run the setup application, set up voicemail, and make a call. You should fully
charge the battery as soon as possible.
4. Press the Power button to turn the phone on.
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