After installing Registry Wizard and tweaking stuff on my MDA Vario, my device rebooted and just stayed on the white screen displaying the operating system configuration screen. I couldn’t do anything else with it – I thought it was dead! Having searched all over, I’ve written a piece about resetting your device here. The one that worked for me for this particular problem was method 3 (but I think method 2 works as well but I didnt have it at the time)
PS I found that it happens when you change the default input from keyboard to something else. Leave it at keyboard and everything should be Ok. Registry Wizard is nonetheless a COOL program, just don’t alter the keyboard setting.
Hard Resetting MDA Vario
There are different severities of hard resetting your MDA vario. Which one you use depends on what you are trying to achieve. If your phone is stuck and wont let you play, try the hard core resets (progress from method 1 (less sever) to method 3 (most severe). If it’s just a bit slow, try the soft reset.
HARDCORE RESET 1
start>settings>system tab> Clear Storage
This will still clear all your data and all the programs you have loaded onto your device. You’ll need to start all over again.
HARDCORE RESET 2
I hold the Comm and Voice Button (top two buttons on the side) AND the camera button (bottom right). Keep them pressed in and hit the reset with your stylus. Keep pressed in and let go of the stylus. Release when you see the following message:
PRESS Send to restore factory default,
SEND is the green lift up phone button on the left
It will do a brief format and restore to factory settings.
HARDCORE RESET 3
If your MDA wont budge with HARDCORE RESET 1 or 2, try this:
Enter Bootloader, – hold the “camera” (bottom right) and briefly press the reset button, don’t release “camera” until you can see colour screen, connect USB cable, and start to re-flash the ROM (download the latest flash rom update from http://t-mobile.iris-global.com/
SOFT RESET METHOD 1
This is the lightest of the reset methods. This is the one to use if you want to reset your device without having to re-install all your personal programs and data
Simply press the reset hole with your stylus on the right hand side of the MDA device.
solution by xda-developers.com