A useful software to backup Contacts and SMS for smartphone
This software (EasyHelper Contacts + SMS Backup) can backup Contacts and SMS to a file. And it can also restore Contacts and SMS from the file. Go to www.easyhelper.net to get more information and download a trial version.
I download a tool called imobiletool sms backup. It helps me to backup SMS messages from Windows Mobile Phone to computer and keep them safe.It works well for me.
Free download at: http://www.imobiletool.com/sms-backup.html