If you have unlocked WT19i Live with Walkman bootloader officially and now for some reason you want to relock the bootloader for WT19i then here is how you do it.

Now, the information that is going to come is for all those who have unlocked the Bootloader on Sony Ericsson Live with Walkman i.e. WT19i and now they want to reverse their decision. It means, this information is for those who have unlocked the Bootloader and now they want to relock WT19i back to it’s original state. Once you have reversed the process, you can run the Sony Ericsson update service and repair your phone to its original state.

Before we start the procedure, you need to download and install a few files.

Install PC Companion from here: Sony Ericsson PC Companion

Install Sony Ericsson Update service: Sony Ericsson Update service

Download Flashtool from here: Download Flashtool

Download Sony Ericsson Relock bootloader file: Relock bootloader

Now, run FlashTool_0.2.9.1.exe.

Once your run it, it will start unzipping few files within itself and make a folder with all the files. Alternatively you can even unzip yourself with other unzipping softwares like 7Zip.

Copy “Xperia Relock bootloader.ftf” file to “firmwares” folder.

Run “X10FlashTool.exe” by double clicking on it.

You will see that some program will open. Just click on Flash button.

Now, moving ahead, you can connect PC and WT19i phone with USB data cable. At that time you must also hold the “Back” key of the Live phone. As soon as the phone gets connected — Flashtool will automatically start the flashing process. Once you are done with flashing process, disconnect the phone from the PC. Switch on the phone now.

This will complete the process. We hope that you have followed all the above steps correctly and with this you will be able to relock the bootloader for WT19i. The above procedure has been developed by Blagus, who is a reputed XDA member. We appreciate his work and development.