1. To start, turn off your phone with the POWER button.
2. Press and hold the Volume Up(+), Home and POWER buttons at the same time for a few seconds.
3. When the Samsung logo appears, release the held buttons.
4. Highlight the wipe data / factory reset option using the Volume Up(+)/Down(-) buttons to navigate through the menu items and the Home button to confirmation.
5. Select Yes - delete all user data using the Volume Up(+)/Down(-) buttons to navigate through the menu and the Home button for confirmation.
6. Restart your phone, select "reboot system now" using the Volume Up(+)/Down(-) buttons to navigate through the menu items and the Home button to confirmation.
Hard Reset - advantages and disadvantages Samsung I5801 Galaxy Apollo?
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, thereby improving its performance. Removing viruses that have entered your phone. Solving problems that have arisen on the device, for example, between the camera and other applications.
Disadvantages of Hard Reset:
All your contacts, data and media files will be deleted. The need to back up contacts, settings and media files. Unfortunately, in some cases, not all viruses on Android will be removed, even after a hard reset.
What needs to be done before the Hard Reset operation.
If you want to do a hard reset on your phone, then make sure you know the login / password for 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 factory reset, the phone is locked because you cannot log into your Google account, then you need to find instructions for bypassing the FRP lock for your phone model. Some new phone models may have problems with bypassing the FRP protection and for this you will need to contact the official service center.
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 important information (contacts, photos, videos) remains in the memory of your phone, then it can be saved in several ways:
Sync your data with Google contacts, Google drive. Using the Titanium Backup program, create a backup. With the service programs for your phone, you can transfer contacts, media files, and important data to your PC.