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Yes, you need to perform a hard reset.

To perform a hard reset

1. Press and hold the Comm Manager button and Voice Command
button on the device. At the same time, use the stylus to lightly
press the RESET button.

T-Mobile MDA Vario hard reset soft reset hardreset softreset
2. Keep the Comm Manager button and Voice Command button
pressed, and the following message will appear on the screen:

T-Mobile MDA Vario hard reset soft reset hardreset softreset

3. Release the two buttons, and press the Send button to perform a
hard reset
.

u can find info via this thread!
http://forum.xda-developers.com/forumdisplay.php?f=254

http://www.nodevice.com/user_manual/htc/pda_phones/htc_tytn.html

download the manual!

it will spoil the phone as it's hardware is not emant 4 windows mobile 5.

download activesync
http://www.microsoft.com/windowsmobile/en-us/help/synchronize/device-synch.mspx

in windows, right click on the CD player with you cd in it.
click explore and look for USB Drivers.
Install the drivers and try hooking your phone up again.
Try using a fast USB 2.0 port on the computer.

If this helps please leave a vote

This method will erase all the data on the device and restore it to factory defaults:

Hard Reset T-Mobile Vario

It is an registry bug from the t-mobile software..
It has been found on only the T-Mobile branded Raphael's.

How to fix it:
Install an Registry Editor

Here http://htc-raphael-100.handster.com/software.php?id=3199&for=HTC+Raphael+100

or

http://www.phm.lu/Products/PocketPC/RegEdit/

Go to:
HKEY_CURRENT_USER>ControlPanel>Phone
Here is an D-Word registry called: CallIDMatch, the value on my phone was standing on "12". When you edit the value and set it to 8. All of the problems dissappear.
It recognizes every type of storage of contact.
and that is your prob solved ;o)

hi. i have had the same problem and have had to change the battery twice in the three years i have had it. sometimes the batteries that you can buy off ebay are quite cheap but go off without any warning fairly quickly.last one i have bougt has lasted me 1.5 years without any probs.
my other advice would be to back up your contacts/other sensitive information somewhere safe( your phone SIM for example- which has to be done one at a time for the mda vario)as well just in case.
hope it helps

another problem if anyone can help is how to send contacts from mda vario to mda vario III??????? its getting me down!!!!
also having problems with sync so cant load onto pc then copy but it used to wk!!