Removing the firmware is sometimes necessary in order to install either a more stable version or a newer one. Removing the firmware itself can be considered either as a separate action or in combination with the action to update the phone's firmware. In both cases, the actions are not difficult, easy to perform and do not pose any danger to the phone.
Instructions
Step 1
Before removing the phone's firmware, make sure that all personal data - messages, photos, audio recordings and depends on the phone book - have been copied to your computer. In order to remove the firmware as part of the phone flashing, you need to have special programs and original firmware on par with the one you want to use. All this can be easily downloaded using the Internet.
Step 2
Synchronize your phone with your computer, then use flashing programs to remove the firmware, replacing it with the one you want to install instead. During the operation, do not press the buttons on the phone panel and do not disconnect the usb wire from the phone, regardless of the behavior of the phone.
Step 3
In case you want to delete all non-firmware data, leaving only the factory version, contact your phone manufacturer. For each phone model there is a code with which you can reset the firmware, settings and perform many other actions - you only need to enter them from the phone keyboard. Only enter these codes when you are completely sure what each one means.