I discovered that the capacitive navigation key buttons light up by themselves when the phone senses a dark environment.
In order to do that the phone uses the frontal sensor near the Nokia logo: if you try to cover it with your finger the buttons will light up in a second.
I did some more digging and found a great explanation on the Windows Central Forums - check it out for more details.
Essentially the lower MPs in the image are a result of how the circular optics project the scene on the sensor and how that circle has to be reduced again to fit the aspect ratio. That's how you lose those 2MP but overall end up with a better ...
Firstly, are you sure you hard-reset it? A typical reset is the following:
Settings > About > Reset your phone
A hard reset involves the Windows Recovery Tool. In order to do this, follow the next steps:
Make a backup of everything you need (photos etc) before starting.
Download the Windows Recovery Tool to your computer.
Connect your Windows ...
Sounds like you've got excess moisture (still) inside the phone - you may be able to drawy this out by sealing in a plastic bag with some Silica gel, or if you haven't got that to hand, some people have had sucess with uncooked rice.
If neither option works, you may need to visit a service centre.
I think I finally find out (but can't confirm myself at the moment).
Looks like Lumia 830 was released with a half baked Denim Firmware Update.
To be allowed to install Lumia Camera 5 on Lumia 830 it need to be updated at least to O.S. version 8.10.14226.359 currently unavailable even trough Dev Preview.
Yesterday my phone finally receive an ...