2. Press and hold the POWER button and the Volume Down(-) button for a few seconds.
3. Release the buttons when you see an exclamation mark on the screen.
4. Press the following buttons sequence: Volume Up(+) -> Volume down -> POWER -> Volume down.
Hard Reset - advantages and disadvantages Microsoft Lumia 640 Dual SIM?
In simple words, Hard Reset means hard resetting the phone. As a result, the system automatically returns to the factory settings and the system is completely cleared. Contacts, correspondence, application, files, search queries, passwords - all of this is deleted from the device's memory.
Benefits of Hard Reset:
The ability to reset the phone to factory settings, thereby increasing the stability of its work. Removal of viruses that interfere with the normal operation of applications and the system. Solving problems that have arisen on the device, for example, between the camera and other applications.
Disadvantages of Hard Reset:
All data and applications on the device will be deleted. The need to have an up-to-date backup of your data, contacts, settings and media files. In some cases, it is impossible to remove all viruses from Android, even after a hard reset.
What needs to be done before the Hard Reset operation.
So that after a hard reset you can use your phone, make sure you know the login / password to your google account. So that, after performing a factory reset, you do not need to remember the login password for the google account, you can log out of the google account before the hard reset. If after a hard reset the phone is locked and you cannot remember the login and password to enter your Google account, then you need to bypass the FRP lock. You will need to contact the official service center to bypass the FRP protection on some new phone models.
After performing a hard reset, your device will be completely wiped clean. Everything that was in the memory of your device will be deleted.
What can be done to avoid losing important information?
If personal data (contacts, photos, videos) remains in the memory of your phone, then they can be saved in several ways:
Synchronize your data and contacts with Google contacts, Google drive. Using the Titanium Backup program, create a backup. Using the service programs for your phone model, you can transfer important data to your PC.