If I try on WiFi, I get the same error message. On 4G, it works WiFi is 350M broadband on virgin, with a solid 5ghz WiFi signal and speed test from my android maxes hits 100mbs. So I have no issues connecting to the internet. It seems like Evernote are not allowing access from devices on WiFi. I also have the issue if I try and sign in on my Google account I get a Email is already registered, but on 4G, works fine on email/password or Google. Account. I was about to purchase Evernote, not now.