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I migrated to a new phone yesterday (Nexus 5 -> Pixel 2) and wanted to restore my WhatsApp chat history on the new device. I've always used the Google Drive backup feature, so I thought this should have been relatively easy. However, during the restoring process, the progress bar gets stuck at 31%. Some minutes later, the app informs me that restoring the messages failed.

What can I do? The Google Drive backup file seems to be corrupted, so I also made a manual copy of the msgstore.db.crypt12 file, so that I could maybe use that in order to restore my history. However, the steps listed on the Whatsapp website (https://faq.whatsapp.com/en/android/20887921/) do not work for me, since it always tries to restore the backup found on Google Drive.

  • I actually did this. Same problem. It just gets stuck at 31% and then tells me it failed. Whatsapp support itself is useless - they don't even really read the question. – JorenB Feb 15 '18 at 11:54
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If your old device is with you

  • Delete WhatsApp backup from Google Drive. See steps from WhatsApp FAQ

  • Redo Google drive backup manually (Settings → chats → chat backup → Google drive) and restore

That will create a fresh backup so corruption is ruled out, though would take longer

Old device not with you but you have copy of database file

  • Uninstall WhatsApp

  • Install Whatsapp and on successfully activating it, immediately disconnect from Internet

  • Copy the database file into the same folder location from which you copied and restore

  • If you choose second method, on successful restore it still makes sense to repeat first step (except restore) to ensure you have a uncorrupted backup – beeshyams Feb 15 '18 at 12:05
  • I will try your first idea after the weekend (I'll be travelling). Thank you! Have you actually tried out that approach before? – JorenB Feb 15 '18 at 12:06
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    Not personally but from a friend who did this successfully with a similar problem of aborted restore – beeshyams Feb 15 '18 at 12:09
  • Still no luck... it keeps crashing at 31%, even when I use a newly made backup :( – JorenB Feb 21 '18 at 13:37
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    Not your problem :) it's WhatsApp that just does a terrible job of fixing the issue. – JorenB Feb 23 '18 at 17:03
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I had something like that too, then I tried on another phone and it worked on it. Then I backed up again and it then worked on the first phone that it didn't work in the first place. So try using another phone, maybe it helps

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