How to backup contacts from Acer Tempo DX900

We used PhoneCopy.com service for this guideline. Using it, your can backup your contacts from your Acer Tempo DX900 easily. The whole backup, including the settings, can be done in several minutes.
Phonecopy client registration is simple. Choose your username and insert your email address, where we will send you a confirmation email that you will need to activate your account.
Windows Mobile setup
This guide works for Windows Mobile 5.0, Windows Mobile 6, Windows Mobile 6.1 or Windows Mobile 6.5. ActiveSync can be found on your phone by selecting Start - Programs - ActiveSync. Next, select Menu - Add source server.
Fill in your user credentials. Navigate between the steps by pressing Next and finally confirm the settings by pressing Finish.
Synchronization will start automatically.
Start future synchronizations by choosing Sync.
Your data is now safe on PhoneCopy. The service stores a full copy of your contacts online, so you can access them from any device or restore them whenever needed.
Some additional tips:
Just as a reminder, the contacts are transferred via your mobile phone service provider, so you need to have data plan activated for the service to work. If you don't have a special data scheme, your carrier will charge you additional fees.