I have four e-mails one each in google, microsoft, yahoo and yandex and all four have two step verification using mobile apps enabled. I have registered in my askubuntu account using my yandex e-mail.
I lost my phone and access to previous SIM card. I am using a new SIM card.
I could regain access to my google, microsoft and yahoo accounts. But, unfortunately, I have not been able to regain access to my yandex account.
Although still I am able to access my askubuntu account, if for any reason in future, I need access to my yandex account, I won't be able to do it.
What to do?