One reason why I love Android: I'd recently updated my Kobo e-reader (foolishly), and while I'm sitting at the playground, I found that it had decided I had to re-register. This being China, it can't reach the registration server...
I've been through this before, after I bought it a few years ago, you have to hack it in order to skip the registration.
Connect it to my phone with an OTG cable, open the device database using an sqlite manager, insert an empty user, reboot and we're in!