In case you didn't come right, I had the same issue.Uninstall Whatsapp from the NEW phone (start blank)Copy the /Whatsapp folder from your SD card to the new phone (I had to do this because Whatsapp on my new phone was installed to the INTERNAL card, not the SD card, so the upgrade didn't find the old store)I also copied the android/data/com.whatsapp folder for good luckInstall Whatsapp on the new phone.After account creation, it should detect the old messages and restore them.