Sony XPERIA Z3 Compact is one of the best smartphone from Sony. These are powerful devices having amazing specs,powerful Qualcomm processor and Yes 21(20.7) MP camera.It doesn’t end here it is waterproof too.
[Disclaimer:First of all one important thing – before you start to do anything with your phone, do the backup of your personal data. It is only for your safety in case that something goes wrong or any mistake happens. In that case you can use the backup to restore the data and try to do everything once again.All referenced files are determined for Sony XPERIA Z3 Compact D5803]
So Lets start flashing this device:
Flashing Xperia could be little tricky.So make sure you have everything beforehand to prevent bricking your phone.
This tutorial is for Android 5.1.1, you can do the same for other versions when available.
Step:1 Check your firmware version (if you already have the newest one, you do not need this tutorial.
Step:2 You need Androxyde xperia flashtool to flash your xperia device. Download from this link.
Step:3 Download also latest Android 5.1.1 ftf file (mirror Google Drive) for Sony XPERIA Z3 Compact.
Step 4:Take the ftf file downloaded in step 3 to folder “Firmwares” included in the XPERIA Flashtool[You might check where your flashtool installed.For me it is C:\Users\administrator\.flashTool\firmwares.
Step:5 Visit Sony Website to Unlock your bootloader.Enter your model number and email on website. They will send you a link where you need to enter your IMEI.
Copy & Save your Bootloader code.
Step 6: Make sure USB Debugging is on your phone.For this you need to enable developer mode.Go to Setting->About Phone->Build Number and tap for some times, It will give you a message “You are now a developer” go back and you can see Developer Option. Go to Developer option and set USB Debugging On.
Unlock your bootloader:
Switch off and disconnect your phone.Open Flashtool and Select “BLU” ,It will ask you to press vol up button and connect usb cable. Once connected in FLASHMODE it will give a popup where you can see your bootloader key.No need to enter it unless it is asked, The tool is itself capable of unlocking however for safer side we can copy and save it for future relocking purpose.
Open the XPERIA Flashtool, click on flash and choose downloaded firmware, than click ok. Important – if you do not want to delete any data of your phone, just uncheck flashing userdata.sin file. All data will remain in your phone, but sometimes it can cause additional troubles. So it is better (and I recommend that) to do the backup of your personal data, than proceed with clean instalation and then restore your personal data.turn off your phone and when Flashtool shows pop up window, connect phone to PC with holding volume down button after few minutes all is done and your phone gets the new firmware