This software tools am about share is all you need to Flash your mobile phone at home, no need taking it to mobile technicians because you can actually do it seating at home for free, all you need to make this happen is to downloaded the necessary software needed to downloaded and installed below:
You can use this tool to download official firmware files for various Nokia devices including the Nokia Lumia 920, 820, 800, 710 and many more.
2. Nokia Care Suite.
Almost all modern Nokia phones can be flashed with this handy tool, Nokia Care Suite. You can use this software to flash your no longer living phone, thus unbrick it, or just flash another firmware.