The soft reset :
A soft reset can be done very easy on a Windows Phone. You have to hold the on-off switch of the smartphone for a few seconds and then select ” To turn of slide downward” Now the smartphone is turned off and can be switched on again, press the on or off switch.
The hard reset:
If the soft reset does not work you have to run the hardreset ...
A soft reset is equivalent turning the phone (fully) off, and on again, in a asimilar way to removing the battery from phones that had a removable battery. There should be no long term damage from doing this, in the same way there's no risk of damage by switching a traditional PC off by holding the power button for more than 4 seconds.
Micosoft has acknowledged the problem and promised to release a fix soon.
PS: Will update this answer as soon as i get news of the fix.
I had a similar issue, but after one crash it just showed white screen and nothing more. I did some googling and found out that those devices have an issue with memory card. And i just replaced it with a new one.
On youtube, there are a lot of instructions about disassembling a device: http://www.youtube.com/results?search_query=htc+trophy+memory+card&...
Try this sequence:
1.Turn off your Lumia device.
2.Press and hold the power button to start your Lumia device.
3.When your Lumia device starts, it displays the Microsoft or Nokia logo. At this instant, release the power button, then press and hold the volume up button. This step should be done quickly.
4.After a few seconds, an image composed of a white ...
Seems like this is a common problem, however, there does not appear to be a (reliable) fix available. Some users have reported clearing the download cache and restarting the download over wifi has helped.