If you want to retrieve messages that you have mistakenly, or voluntarily, deleted, WhatsApp saves a copy of your messages in the WhatsApp/Databases folder on your Android device daily (at 4 a.m.). The procedure to recover them will depend on their age; however, you will not be able to recover messages older than seven days, the maximum time that WhatsApp keeps the backup copies.
The procedure for retrieving recent messages is simple: just uninstall and reinstall WhatsApp on your mobile phone. During the installation process, you will be asked if you want to restore your message history. At this point, choose Restore:
After you have chosen to restore the messages, deleted messages will appear in the Chats window. If some messages don't appear, they may be part of an older backup.
N.B. Before uninstalling WhatsApp, we recommend that you back up your conversations.
Before you start restoring your older messages, keep in mind that your last conversations will be erased during the process. You will only be able to recover messages from backups of the last seven days. Additionally, your cell number, registered in WhatsApp, must be the same one that you had when the backup was made.
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