There are several ways to log into Instagram without SMS verification. You can link your page to your Facebook account, but you need to do this either when creating an Instagram profile, or in advance. Otherwise, it will not be possible to restore. You can also log in to Instagram without an authentication code using email. If more than one method does not work, contact the support service of the social network. But you can use the site "Grizzly Sms", there will be no such problems with a fake number.