How To Flash Sony Xperia Stock Firmware
1- Download the Sony Xperia Stock Firmware
1) Install drivers for your Sony Xperia You need to ensure that your PC has all of the necessary drivers installed for your Sony Xperia device. The best way to do this is to
install Sony PC Companion.
Make sure you connect your Xperia to the PC before starting the process to download the necessary USB and ADB drivers. The best way to do this is to power off your Sony Xperia and then connect to your PC whilst holding the volume down button.
2) Install Flashtool
Download and install Flashtool from the official website here. This guide is based on using Flashtool version 0.9.19.10.
Install Flashtool drivers from the following location: ‘C:Flashtooldrivers’. Tick the “Flashmode Drivers” and “Fastboot Drivers” to install.
Note: To install the Flashtool drivers for Windows 8/8.1/10; please follow the steps below.
A) Press the Windows key + R together and in the ‘Run’ box type: shutdown.exe /r /o /f /t 00
– Now make the following selections to boot into the Start Up Setting
Screen: Troubleshoot > Advanced options > Start Up Settings >
Restart
– Then, when the machine restarts, select number 7 i.e. “Disable driver signature enforcement”. Your machine will start with Driver signing enforcement disabled until the next reboot.
B) Now you can install the Flashtool drivers.
– Windows will warn that the driver is not signed and will require you to confirm the installation.
– Once the installation is complete, reboot the machine
3) Enable “USB debugging” and “Unknown sources” on your Sony Xperia device
‘USB debugging’: Settings > Developer options
‘Unknown sources’: Settings > Security
Flash your FTF firmware file
This section details the steps needed to flash new firmware on your Sony Xperia device.
First of all, open Flashtool and then click on the lightning bolt in the top left of Flashtool as highlighted below.
Select “Flashmode” and click “OK”.
You should already be in the source folder where the FTF firmware files are located. If not, navigate to: “C: Users[Your PC Name].flashToolfirmwares”
Select the firmware build version that you want to flash from the “Firmware” pane. Ensure the device variant is the same as the model number of your Sony Xperia device.
If you want to retain your apps, data and media (photos, videos, music), then ensure that the “USERDATA” option within the “Wipe” pane is unticked. However, we recommend that when upgrading a major new Android version, a clean install is a way to go. In this case, tick all options under the “Wipe” pane. This will wipe all of your data though including your photos and videos, so please ensure you have these backed up elsewhere.
IMPORTANT – For FlashTool 0.9.19.10 and older:
If you skipped Part 2 of the guide as you already had your own FTF firmware file, then you may see the following ‘SIMLOCK’ option ticked under the “MiscTA Exclude” pane. DO NOT untick SIMLOCK as it could lead to problems with the network lock on your device.
IMPORTANT – For FlashTool versions 0.9.22.0 to 0.9.22.2: The developer has changed the meaning of the tick box in newer versions of Flashtool, which means ticking the box includes “SIMLOCK”. Either way, you want to ensure you are NOT including SIMLOCK when flashing the Stock firmware. So to be clear, when presented with the “SIMLOCK” option below, you must NOT tick the box.
NOTE – For FlashTool 0.9.22.3 onwards: The developer has disabled “SIMLOCK”, which means you no longer have to worry about accidentally including it in your firmware flashing. The option is only enabled by entering ‘Pro’ mode. Unless you know what you
are doing, then stay well away from Pro mode.
Click “Flash”. Flashtool will then indicate that it is “preparing files for flashing”.
You may have to wait around 60 seconds for the pop-up below to appear. Once it does, you should now connect your Sony Xperia device. Make sure the device is powered off and then hold the ‘volume down’ button whilst connecting the USB cable. Once the pop-up disappears and flashing has started, you can let go of the ‘volume down’ button.
Flashtool will then start flashing your Xperia device.
Once you see “Flashing finished” as indicated below, your Sony Xperia has been successfully flashed.
Congratulations you have just installed
Now disconnect your Xperia device and power on the handset. Don’t worry
if it takes a while for the handset to boot; this is to be expected.To confirm that you have upgraded the phone software, click on ‘Settings > About phone’, which will reveal your new Android version and firmware build number.
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