Trasfer all Samsung Galaxy J1 reject Phone call list to Samsung Galaxy J3

Whilst it is relatively easy to transfer Contacts, App, SMS, etc I have not found a way to transfer the Caller Reject list on the J1 to the Call Blocker list on the J3. I have about 30 rejected numbers ( spam ) in my J1 list and there must be a way to send them to the J3. Smart Switch does not do it or even Google backup.. Any ideas?

Thanks

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