It adjust the backlight brightness like some of the monitor with dynamic contrast or what not.
When screen has most black, the backlight will dimmed down.

Turn off the backlight feature. Dont need to sell your phone.

optimised backlight on, adapt to lighting on, phone function as per normal

Switch settings optimised backlight off, phone function normal.

Restarts phone with backlight off, Sony logo turns up, phone turn blank with backlight remained on for 5 minute before i decide to hard reset from the SIM tray. Phone vibrates 3 times.

Turning on the phone again, same thing happens, SONY logo turn up and screen turn blank again with backlight on. xperia logo turn up after 2 minute and booted with wave animation and home screen appear. Turn off display with power button, screen shuts up completely. Attempt to turn on the screen fails. Force reset needed again.

Second reset attempt successful wih xperia logo appears instantly. Phone behaves normal now with display setting optimised backlight off and adapt to lighting on.

Restarts phone for 3rd time. Screen halted again after sony logo. Xperia logo appears after 2 or 3 minute. Home screen loaded with maximum brightness, and sudden dimmed and regain brightness.

Turned off display with power button. Screen cant turn back on again.

Same behaviour again after hard reset with screen halted for 2 3 minute after Sony logo. Home screen loaded with backlight at maximum. Power off screen immediately will turn off the display but the backlight remained on. Pressing power button again and the screen turns back on with max backlight. Phone functioned normal with backlight problem.
Restarts phone similar behaviour again with halted boot screen.

Conclusion, problematic backlight. Possible firmware related.

Solution
Turn on optimised backlight.

Pointed out from andrew, similar problem with xzu.



This post has been edited by hikashi: Oct 2 2013, 12:40 PM

Weird problem. But why do we need to turn off the optimised backlight settings?
I dont see obvious difference in it anyway

Clash of clan available for android now but not this country zzzz

I do have some kind of overlay shape on the naked screen when viewed on an angle with lamp reflection. After applying sp can't see anymore.

You doing it correct. You need to press at the same time and hold it longer.

Spot anyone selling IMAK transparent case yet?

anyone can scan or give a snippet of the Z1 guide book?

not compatible with docking

Guys, check out you Xperia privilege app. There's one pretty harem app they suggested called pullpullpic. You know what to do with it.

Install DashClock and set the DayDream settings in display

your phone gonna be so bugged when its turned off

Got the nilkin back casing. Doesnt seems to fit the docking even with the bigger bracket

this sucked, the sony official back casing works but not with aftermarket.

Ok. removed the bracket completely and put some coins behind it. Not a sexy solution but it still work.

The Z1 dock also comes with 2 inserts/brackets but it look like this:


The one on the right is the bigger bracket it comes with some kind of notch at the 2 ends, which blocks my phone with extra casing

still a WP os .

Regardless to say, 1020 double the sensor size of Z1.

black is sexy.

https://www.facebook.com/photo.php?v=566540...&type=2&theater

lolwut?