Google has announced they have dropped support for crawling the web as a feature phone and have also removed the crawl error reports in Google Search Console.
Google said that most websites don t provide feature-phone-compatible content in WAP/WML any more.
Google said that because of this change, they have made changes in how we crawl feature-phone content.
This does not impact how Google crawls or indexes smartphone content, just feature phones.
Feature phones are those old Nokia phones that let you access websites in a text-based interface.
Google won t be using the feature-phone user-agents for crawling for search going forward.