Unlocking Bootloader - Sony Xperia M4 Aqua

Ladies and gents,
Any downsides on unlocking bootloader?
Is Camera working properly? TrackID? Others?

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All works perfectly... tested on E2303

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@alby_var
I tried to unlock. However, I believe once you´re on fastboot mode, Flashtool should recognize your device (mydevices) and your ulcode.txt.
Field came blank. Did not work. My flashtool is 19.0, so I don't have a "custom" folder. It's C:\User\.flashtool\mydevices\BY900FGM8D\ulcode.txt, and I don't know if this is right (I mean, device and ulcode are right; I wonder about the folder).
Edit: Solved. New folder and ulcode.txt should go to C:\Users\YourUser\.flashtool\registered Devices

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alby_var said:
All works perfectly... tested on E2303
Click to expand...
Click to collapse
Also same camera quality in low conditions light?
Enviado desde mi E2303 mediante Tapatalk

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Not tried... But in good luminosity it work good
Sent from my E2303 using XDA Free mobile app

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Chris_Castro said:
Ladies and gents,
Any downsides on unlocking bootloader?
Is Camera working properly? TrackID? Others?
Click to expand...
Click to collapse
you may not see the difference, but the quality will be bad - transfer the pics to a computer and check the quality , and your warranty is void now.
Of-course, you will lose your DRM keys
You can check your DRM Keys at *#*#SERVICE#*#* (in your phone dial pad type *#*#7378423#*#*) >Service Test>Security and check if all the entries says "Key OK" then you are good and have not lost anything. If any entry says "Unknown" then you have lost that particular DRM Key.

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Can you check and show a screenshot with Drm keys lost?
Here my screenshot
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Enviado desde mi E2303 mediante Tapatalk

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you can check this post below for any more details
http://forum.xda-developers.com/showthread.php?t=2765813
Edit: Once you unlock your boot loader, the DRM Keys are lost, the only what to recover is to make a backup of your TA partition.
To make a backup of the TA partition you need root access. That means you should root your phone even before you unlock the bootloader.
You cannot use the TA backup of a different phone (same model or not), as this will permanently brick your phone and cannot be repaired. the TA backup has to be of your phone only as the DRM Keys are unique to each phone.

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RohitBopnna said:
you can check this post below for any more details
http://forum.xda-developers.com/showthread.php?t=2765813
Edit: Once you unlock your boot loader, the DRM Keys are lost, the only what to recover is to make a backup of your TA partition.
To make a backup of the TA partition you need root access. That means you should root your phone even before you unlock the bootloader.
You cannot use the TA backup of a different phone (same model or not), as this will permanently brick your phone and cannot be repaired. the TA backup has to be of your phone only as the DRM Keys are unique to each phone.
Click to expand...
Click to collapse
Thanks,
Your screenshot are all Key OK except MARLIN, WMLA (missing in my device) and CKB
Someone knows this keys?
Info Wikipedia:
Sony uses Marlin in the PlayStation Network, allowing users of the video download service to share purchased or rented content on PS3, PS4 and PSP systems.
Other question: Miracast work after unlocking?
Enviado desde mi E2303 mediante Tapatalk

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When losting DRM keys mean nothing break and camera and other apps are normal, is any reason to wait for prerooted firmware or i can unlock it? But... When losting DRM keys mean nothing happen, why are here these DRM keys? ...
Sent from my E2303 using XDA Free mobile app

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My Advice, dont even think of unlocking your Bootloader, with out a TA Backup, wait for a root exploit to be identified and take a backup of the TA partition, before you do anything.
I had a bad experience on my Xperia Z, after UB, the camera software has some code to check for DRM Keys and if they are missing, the App still works, but the picture quality was BAD, i mean really BAD a lot of noise in the pictures. unfortunately i did not backup the DRM Keys, so my warranty was void and had to live with a bad camera when using stock firmware. I move to CyanogenMod after that for some decent picture quality.