If there's one thing I learned from upgrading several family members' Android devices over the past week, it's that people are really attached to their WhatsApp history. While my smartphone days kicked off in 2007 with switching to a new review unit every couple of weeks (followed by flashing a new ROM at least once a week in 2011-2012) and learning to let go of everything I couldn't bother to move around, most users aren't accustomed to losing their data. They want their new device to have exactly what their old one had: their contacts, chat history, photos, music, and so on.

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