Sony Xperia m5 dual upgrade to marshmallow, a disaster! (Almost)

Forger about upgrading your xperia to marshmallow, better just make a hard reset or factory reset and see if the system's corrects itself.

Some strange behavior started with our Sony xperia m5 dual and we decided to give marshmallow official update a chance. Bad idea. Our battery was damaged before and now it is almost over. Power consumption is lot higher than in lollypop and don't forget that replacing the boot loader is a very difficult process involving requesting some code to Sony corporation and they warn you that you'll or could loose key functions as those related to low light sensibility for the camera.

Now we are trying to figure out how to downgrade this time with stock ROM from some Russian hackers without having to unlock the boot loader or root the device.

I can't say the camera is better perhaps ISO sensibility is better for still images but I don't like the GUI and video under low light it is still bad.

Hope our stock ROM we got work as good as lollipop 5.0 correct me if that was not the version which come with brand new xperia. The version you can find on the internet is lollipop 5.1