First step for Installing ROM

1.  Sony XPERIA Firmware tft file
2. FlashTool (Sony Mobile Flasher by AndroXyde)
3. USB Driver (included in FlashTool) or use PC Companion

How to Install Sony Xperia ZL(C6503)

1. Open Flashtools and click the distance as described
2. In the next window, click “Flashmode” and then “OK”
3. In the next window, select the rom and “OK”
4. see that in the next window will take a while, it is preparing the files ;
5. At an average of 10sec, a new window will appear
6. turn off your phone, press “back” (if it does not, press volume – less), be pressed and connect the USB cable
7. Wait for the process to finish, until like the image below, remove the USB and turn on your smartphone !.
8. After flashing process starts and might take up to 5-10 minutes. So keep patience and wait