I have xperia L, and I m trying to upgrade my os from 4.1.2 to 4,2.2 but I m not being able to do it. I tried to update os from Sony PC comparison and flash tool. Actually for doing so, I have to switch to flashmode and I tried soo many times to plug my phone while holding volume down key but still nothing happened. So please give me some advice for this situation. ...............
