[. . . ] T-Mobile MDA Troubleshooting Problem Power and Battery I cannot turn on my device. Connect your device to the AC adapter and check LED indicator whether device is charging. [. . . ] Soft reset your device by pressing Reset button with the stylus. My device keeps turning itself off. My device's date and time reset to factory default if I have removed or replaced battery. Why does my device power reduce faster than my friend's? ActiveSync ActiveSync operation cannot be performed or connected. ActiveSync is connected, but I can not transfer data. Display and Sound Screen freezes or no response. My device doesn't make any sound. My device's sound only can be heard from the headset. Check the Sounds settings by tapping Start > Settings > Personal tab >Sound & Notifications. Re-inserting the headset plug into the Audio Jack and then unplugging it may help sometimes. The wireless connection to the network must be switched on, and the signal must be unobstructed. Connection & Bluetooth I can not connect to the internet; Web surfing doesn't work. I can't perform over-the-air synchronization. Unable to use Infrared (IR) to transfer information. Synchronization to a server allows your device to sync, over-the-air (OTA), directly to a Microsoft Exchange 2003 Server. This allows you to update your e-mail, contacts, calendar, and tasks information securely from any location with data connectivity. In order to use this functionality, you do not need a PC running; however, it does require your IT administrator to enable you to use this service. Line up the IR ports so that they are unobstructed and within close range. Also, ensure you are within 10 meters of each other, and there are no obstructions. Finally, make sure the other device is set in "Discoverable" mode. I cannot end a Bluetooth connection. I cannot find another Bluetooth enabled device. I cannot connect to the Internet through GPRS / EDGE. Ensure that you have the correct APN (wap. voicestream. com) entered in your GPRS connection settings. Operating My device operation performs slowly. You may have opened too many programs. To release the operation load, you can terminate unneeded running programs by tapping Start > Settings > System tab > Memory > Running Programs. Delete any unnecessary files such as old email, image files, or large video files. [. . . ] I need to create space on my phone. Media Player I cannot move a file from one folder to another in Windows Media® Player. What type of extension files can Windows Media® Player play? Phone My device cannot dial out or receive calls. How can I quickly find a contact and place a call? Why is there no signal with SIM card inserted? Make sure the SIM card is installed properly. [. . . ]