Actually i didn't rooted phone. Like didn't fully root. An exploit that does it without unlocking bootloader. I was able to run root required apps but when i was trying to mount r/w mode, the phone was restarting itself before i do something. So i copied build.prop to another place, changed it, then in root explorer copied to /system. I managed it to owerwrite before phone restarts. When phone shutted down, didn't open, stucked at that point. Keeped restarting.
I know a lot of questions, topics opened about this but almost every solutions says that "repair over sony pc comp" or "repair over SUS". I tried both but in pc comp, program couldn't find my phone because it's turned off. when i open phone and connect wire it finds the phone but before pc comp finishes connecting phone restarts again. And in the SUS, i managed it to go into flash mode (volume down key and then connect.) It has found the phone (however green light didn't come out, no LED color was there) and SUS said there is no update for my phone, it's up to date. There is no repair button.
Besides there is another solution, flashtool. Will i lose my data if i use flashtool? I'm able to go into fastboot mode (blue light).
What can I do?