It will remove all the data ,contacts and apps that you installed
- At the beginnig switch off your phone.
- Then press the Power key once.
- Afterwards press and hold the Volume Down button.
- Release held key when you see the exclamation point.
- Press the following sequence of buttons: Volume Up – > Volume Down-> Power – > Volume Down.
- Success! The hard rest has just been performed.
- If the display is off, press the Power to turn it back on.
- Go to Windows Phone Settings.
- Afterwards select About.
- To confirm the whole operation tap Reset your phone.
Microsoft Lumia 640 XL LTE Dual SIM Restore Factory Hard Reset Format Phone.So lets start the Microsoft Lumia 640 XL LTE Dual SIM Restore Factory, Microsoft Lumia 640 XL LTE Dual SIM Hard Reset.Turn Off the mobile phone for few mints. Microsoft Lumia 640 XL LTE Dual SIM Remove Pattern Lock.
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Restore Hard reset will set your phone in origional factorry settings. It will remove all the data and apps that you installed. Your contacts will be removed and you have to add them again.