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Some HTC handsets go 16 bit after Windows Phone NoDo update

Posted: , by Victor H.

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Some HTC handsets go 16 bit after Windows Phone NoDo update

Updating your Windows Phone 7 handset is supposed to improve the functionality of your phone, but it seems that recent updates have done everything but that. Some Samsung handsets were bricked after a minor update and now WP7 NoDo update has brought color depth problems to HTC phones. Luckily, this time the issue doesn't render your phone completely useless, but decreases image quality to 16 bits.


16-bit images translate into noticeable color banding, often occurring throughout the whole operating system. Put simply, with 16 bits you have a total of 65536 colors versus some 16 million on a 24-bit system. The difference is most noticeable in gradual color variation as you can see on the image below where the background shadow looks posterized. Alex D' on Microsoft Answers details the issue:


“I've got NoDo on HTC Trophy. Everything is okay at the moment, except a color depth. It was definitely decreased from 24bit to 16bit. I see now bandings on wallpapers and pictures. It was not like that before - the gradients were smooth and nice. Why it was changed and how I can 24 bit back?”


An unofficial fix has already been posted on the XDA Developers forum. You have to change the following keys in the registry, followed by a reboot, but try it at your own risk as Microsoft hasn't come up with an official statement just yet:


HKLM\Drivers\Display\Primary\PrimBPP dword 32

HKLM\Drivers\Display\Primary\bpp dword 32

HKLM\Drivers\Display\Primary\PanelBPP dword 32


Have you experienced the same problem? Let us know in the comments below!


source: WMPoweruser and Microsoft Answers


Some HTC handsets go 16 bit after Windows Phone NoDo update

6 Comments
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posted on 11 Apr 2011, 05:21 1

2. fatexo (Posts: 60; Member since: 21 May 2010)


WTF...???!!!!
i was just gonna buy a HD7 or mozart and saw this..!!

posted on 11 Apr 2011, 13:18

6. shafboy (Posts: 179; Member since: 26 Sep 2010)


My Mozart is fine after the update.

posted on 11 Apr 2011, 05:51

3. andro (unregistered)


Welcome to the world of tommorrow.......or maybe yesterday with 16bit systems. windows phones are a disaster,every update runs the heavy risk your phone will be bricked or suffer something like this. For an os with a terrible ui of ugly block panels and massive os limitations they really aren't helping themselves with big mistakes like this

posted on 11 Apr 2011, 06:42 2

4. Windo (unregistered)


Mr Andro(id), you suck. You saw a chance to spill some hate and you took it, right? No need to listen to what you say because you only say it in a bitter state of anger, true?

At least the update is pushed through to all devices at the same time (if it wasn't for your US carriers cockblocking their customers). How are those Androids updates going? Many 2.3 handsets out on the market yet..?

posted on 11 Apr 2011, 08:30 1

5. Windo2 (unregistered)


Nice reply ROFL

posted on 14 Apr 2011, 10:37

7. sid (unregistered)


How can i sort this issue out on an omnia 7??? i have this color banding problem on the samsung omnia 7??

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