Simple but cool app: [Archive.is] SMS Backup+ – Apps on Google Play:
Automatically backup your SMS, MMS and call history with a separate label in Gmail and Google Calendar.
Later you can restore the saved data (except MMS) back to the phone, especially useful when switching to a new device.
IMAP access needs to be manually enabled in Gmail, see the website and FAQ for more information. You can of course use your own IMAP server for backups, giving you full control over your data.
SMS Backup+ is a free open-source project which has been in active development since the early days of Android, completely ad and tracking-free, supported through voluntary donations.
Sourcecode: [WayBack] GitHub – jberkel/sms-backup-plus: Backup Android SMS, MMS and call log to Gmail / Gcal / IMAP
Via: [WayBack] Wirre Telefongespräche für 500. Ich kriege ja nicht mehr oft Anrufe auf der deutschen Telefonnummer, und so liegt das Telefon jetzt daheim und hängt am… – Kristian Köhntopp – Google+
–jeroen