Smartphone Blocked URL errors in google webmaster tools

[Divya_Rai]

How to solve the Smartphone blocked url errors in Google Webmaster tools?

 

[sarataylor]

Site errors: This section lists errors that prevent Googlebot from accessing your site at all.
URL errors: This section lists errors Googlebot encountered when trying to crawl specific URLs. You can search for specific URLs or errors. There are three tabs corresponding to three different Googlebot crawlers:
Web
for Googlebot, Google's main web crawler.
Smartphone
for Googlebot-Mobile for smartphones.
Feature Phone
for Googlebot-Mobile for feature phones.

 

[Divya_Rai]

I have disallowed none in the robots.txt, but still its showing old urls got blocked.