I recently switched phone from an S9 to and S21, and when migrating my whatsapps I have successfully done so with my primary whatsapp. However the secondary whatsapp gets stuck at "preparing to restore" messages after supposedly finding my backup.
The regular process of installing dual messenger etc. and activating the secondary whatsapp works just fine, but once it gets to the restore from google drive backup it indefinitely is stuck in "preparing to restore".
The backup is definitely not corrupt, I have re-done the backup from the old phone several times and I can see it OK on my google drive.
I understand your situation but it is a 3rd party application which is not from Samsung. As we are trained to handle Samsung software and hardware related troubleshooting, we advise you to contact to the respective application software support. You can reach to the app developer through email channel for which please login to play store > select more option> select installed app> click on read more. We sincerely regret for the inconvenience. If you have any queries regarding apps developed by Samsung, I will be happy to help you. Thank you for writing to Samsung.
I am not using a third party application to clone the whatsapp - it is a built in Samsung function for cloning apps.
The secondary/dual app also does not interact at all with the camera so pictures and videos cannot be taken within the app (despite permissions being correctly set). It is unclear if the problem lies with Samsung's cloning of the app, or if it lies within whatsapp. However the primary whatsapp works totally fine as always.
There are issues both with the functionality of the cloned app, and with restoring data from a functional Google Drive backup.
i am using S20 FE 5G & S23 Ultra - I also face same problem yesterday as dual whats app setting on login using same number in same mobile without mobile reset ,but there is no existing chat in that whats app - all chats are clear no backup restore in - dual whats app - so my suggestion is don't use that setting of Dual app Setting
