Use APKPure App
Get SMS Backup & Restore Online old version APK for Android
Save your message in the gschickt.de-Cloud as a backup or for a migration
With this app you can save your messages online on our gschickt.de-servers. So you can switch your mobile or reset to factory settings without losing your messages.
This app is in development. Please be patient and don't rely on this method. Don't play with the functionality - you might lose your data.