Windows Phone
- in the Cloud: https://www.windowsphone.com/de-de/how-to/wp8/settings-and-personalization/back-up-my-stuff
- offline Windows Phone 7: with the WP7 Easy Backup app
- offline Windows Phone 8: http://wp7app.de/24104/tipps/der-ultimative-windows-phone-8-1-backup-guide.html
Blackberry
Because the Blackberry support websites are frequently revised, the links become quickly outdated. For this reason we have to ask that you research this topic on your own: Blackberry Support
You can streamline your search by knowing the exact model and operating system version. Help is available at: de.blackberry.com/support/identify.html