Not getting authentication on android device

[DanielleMartins]

I just created a vivaldi account. I logged in on my computer and my tablet, but I couldnt do it on my cellphone. It says "authentication failed". But I got authenticated normaly in computer and tablet, so I'm not understanding why this is happening. Could somebody help me?

[jane.n]

@DanielleMartins If it's a brand new account, then logging in to webmail can fail if you haven't verified your phone number yet.
In case login fails even after verifying your phone number or somewhere else on Vivaldi, please tell me which service you're trying to log in to and what the full error message says.