This is new feature of Windows Phone 7.8 to comply with European audio limitation, which is mandatory in new devices in EU in 2013, to avoid the possible damage of ear hearing. You can still adjust the volume level up to 30 with the volume key on the side.
- Why am I unable to see the app update notification on Windows Phone Store tile?
- Can I download and save music or video email attachments to my Nokia Lumia phone?
- My phone does not vibrate properly
- I can see a symbol with a circle inside it the status bar. What is that?
- Why does my Nokia Lumia automatically switch on when it is charging?