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When i try to start WhatsApp Web on the phone, the QR-Code scanner screen does not even open, but i get a passive notification "check your internet connection on the phone". While i can chat with WhatsApp without any problems, so the internet connection and the connection to WhatsApp cannot be the real problem.

How can i get Whatsapp to recognize that the internet connection is fine and open the qr code scanner?

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    I would re-install the app and see if that works. That is not a normal thing that happens in the app. Also, reboot your phone and try it again. Commented Aug 13, 2016 at 14:31
  • Also, if you're worried about backing up your chats, you can take a back-up on Drive, and restore that back-up. Try un-installing the app as Devin Ersnoy pointed out. Commented Aug 13, 2016 at 15:17
  • I try to avoid services like google drive and so on, that's why i am a bit hesitant. On the other hand its quite possible that something is broken because i restored the data by copying the WhatsApp folder and restoring a TitaniumBackup on a new phone. Maybe i try how good the backup in the WhatsApp folder can be restored, iirc this should be possible as well.
    – allo
    Commented Aug 14, 2016 at 19:57
  • Did you tried ON/OFF your Wi-Fi or Mobile internet connection? After reading your post I tried with my Wi-Fi OFF/ON, and QR Code screen was opened by WhatsApp. When there was no internet WhatsApp throw error saying You don't have any network access now which is different error then what you wrote in your Question. You may upgrade WhatsApp to latest version and try! Commented Aug 24, 2016 at 6:39
  • I tried several on/off settings of mobile data and wifi and whatsapp should be the latest version (a few updates since the post). I suspect some problems with xprivacy/androidfirewall, but it worked on the old device with the same rules. And general network access works as well. I think i do a backup+reinstall when i have enough time to make good backups to make sure i can roll back when i lose any chats during testing.
    – allo
    Commented Aug 24, 2016 at 20:54

1 Answer 1

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It works after a Backup & Reset:

  • Make a new local backup (via settings -> chats -> chat-backup)
  • uninstall WhatsApp
  • install WhatsApp
  • Login via Phone number and sms verification (even when there's a backup)
  • Whatsapp finds the local backup and asks if you want to import it. Nothing is lost, but a few settings. Profile image is restored, but for the screen name whatsapp asks you again (and suggests the name from your google account)

So if someone has the same problem: backup & restore works fine. Of course it doesn't hurt to have a TitaniumBackup, adb backup or similiar as well.

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