Hi @simo2010, my apologies – I understand now.
With your Android device are you using the Chrome browser as default? I have just tried to access my website for the first time from my phone and was presented with the 2FA box after inputting my username and password.
The 2FA box usually fails to show in this way with a Javascript conflict, but it does seem unusual that it’s working on your desktop PC, so may rule this out. On your Android device, does it make a difference to try incognito/private browsing to log in, or when clicking “Desktop Site” in Chrome after clicking the 3 dots at the top?
If those don’t work or help, it would be worth disabling ALL plugins EXCEPT for Wordfence and trying again. There could be a plugin that’s loading its Javascript improperly, or failing, on mobile devices to cause the issue.
Thanks,
Peter.