How can I move my ID to a new device?
When you switch your device (or reset it to factory settings), you can transfer (or restore) your Threema ID and continue to use the app as usual. To transfer your ID, you need a Threema Safe backup.
Alternatively, you can create an ID export. A data backup also contains your ID, but it can only be restored on the same operating system it was created on (i.e., you can’t restore a data backup that was created on Android on iOS, or vice versa). It’s recommended to create a Threema Safe backup.