Find a software converter able to convert spb files to nbu files.
It is not possible to directly convert .spb backups from Samsung devices to a Nokia backup files (.nbu). However, if you are looking for a way to transfer contacts from one device to another, you should first try to export spb to csv and then import the contacts to your Nokia device using the Nokia Suite software.
Updated: February 23, 2017
Unfortunately, there is no detailed software record in the database for this conversion.
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