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the WhatsApp chat transfer feature has worked for me many times https://faq.whatsapp.com/209942271778103/ https://faq.whatsapp.com/209942271778103/ for Viber I
by akaitea 7mo ago
the WhatsApp chat transfer feature has worked for me many times https://faq.whatsapp.com/209942271778103/ https://faq.whatsapp.com/209942271778103/
for Viber I've only tried it via the backup on old phone and then restore that backup on the new phone