tắt nguồn lấy cục pin ra luôn rồi mới làm
cái máy này nút nguồn nó là cái nút end call luôn nên bấm cái là nó mở nguồn luôn
Vậy bác làm theo cách này nhé, nó giành cho Verizon, vì nút trên đầu chỉ là sleep buton, không phải power
To perform a hard reset
1. With the device turned off, press and hold the VOLUME DOWN, TALK/SEND, and END/POWER buttons until you see this message on the screen.
Wiping user data/settings & any user installed applications... 1. Press VolUP to restore manufacturer default.2. Press VolDown to restore custom configuration.3. Press other keys to cancel.
2. Release the VOLUME DOWN, TALK/SEND, and END/POWER buttons.
3. Press the VOLUME UP button to restore the operating system to the factory default configuration, press the VOLUME DOWN button to restore the factory default configuration and remove any operator customization, or press any other button to cancel the reset.
Using Clear Storage
If you can access the device settings, you can use Clear Storage to reset your device back to factory default settings.
1. Tap Start > Settings, and then tap All Settings.
2. On the System tab, tap Memory > Clear Storage tab.
3. Enter "1234", tap OK and then tap Yes to confirm.