Firmware Change/Update on SONY Xperia Neo L MT25i

How to Update / Change / Repair Firmware in SONY Xperia Neo L MT25i phones?

Necessary Tools and Drivers

  1. Sony PC Companion with Drivers
  2. Sony FlashTool 32bit
  3. Sony FlashTool 64bit

Install Necessary Tools

  1. Start by installing Sony PC Companion with Drivers
  2. Unpack and Install FlashTool, then find x10flasher.jar which is in C:\FlashTool folder and replace it with the file from the unpacked archive.
  • Windows 10 users should go to c:\Windows\inf  and search for the file "wpdmtp.inf" press right button on it and select INSTALL. 

Changing firmware in the phone will erase all of your data.
All described operations you are doing at your own risk.
If want saves your data do a backup before start.
Battery must be at least 60% if not you will kill phone completely.

Change/ Repair/ Update Firmware in Sony Xperia phones

1. First of all, we need to find out exact phone model that we've got. 

  • This can be done by entering IMEI number on Sony phone check
  • also, you can find it in Xperia Neo L MT25i  phone menu as shown below

  • or from the label which can be found next to the phone sim/memory card slot.

2. Turn on FlashTool(depent on windows system 32/64bit use file Flashtool or Flashtool64) sony flashtool screen
3. Go to XperiFirm,

4. Select SONY Xperia Neo L MT25i model, xperiafirm model select

5. Now choose exact  Xperia Neo L MT25i  model from step No. 1. xperiafirm model exacly select

6. Select firmware by country that you need
(unbranded firmware you can recognize by name CUSTOMIZED_CE1 or CUSTOMIZED_SG they come with all language packages from around the world) xperiafirm model customization select

7. Download firmware by pressing firmware version button.

8. After download is finished close XperiaFirm, now FlashTool will ask you if you want to add downloaded firmware to database just click YES button to confirm. sony flashtool ask if add new firmware to database
9. Next press lightning button, flashtool sony arrow to lighting

10. Select Flashmode and confirm with OK button.

11. Select SONY Xperia Neo L MT25i  phone model and model number of your phone, firmware customization and firmware version the one you've downloaded in step No. 7. 

12. Next check userdatacust-reset everything else must be unchecked.
flashtool sony arrow to check option to correct flash
13. When you're ready press Flash button. flashtool sony arrow to flash button

14. Connect turned off Xperia Neo L MT25i  phone to USB cable with pressed volume down button.
15. Release volume down button when you see "Device connected in flash mode" information in FlashTool windows log.The flash process starts, now just wait until process end.

16. After all disconnect Xperia Neo L MT25i  phone from the USB cable. Turn it on with the power button and leave it on a flat surface until phone turns on completely
(this is very important otherwise the phone will not complete the first start and you will see an error message on the phone screen).
17. Congratulations your flash process ended successfully. Now you can enjoy your SONY Xperia Neo L MT25i with new firmware.

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