Shutting down m. domain

[Rahim119]

hi, we are planning to shutdown the m.xyz.com domain and currently www.xyz.com domain made as responsive design, earlier, we used to redirect all the moble devices to m.xyz.com domain and in m.xyz.com all pages are canonical and pointing to www.xyz.com

Few mistakes we have done during the launch of m.xyz.com (almost all 2 years back)
 lot of pages created as there was no tag add canonical, and there are some pages where canonical was not added  and sometimes it will show in the destop results as well

what steps we need do for shutting down m. domain.. pls suggest in mobile webmaster as well

[GastonRiera]

Hi Abdul,

Just redirect 301 the m.xyz domain to the responsive site. That should be all.

Remember that it might impact your SERPs and it might take some time to be completely updated in Google index. Always update the sitemap.xml without the old domain.

Hope it helps.
GR.

[GlobeRunner]

If you are going to literally shut down your m. subdomain, then the best way to do it is to use 301 Permanent Redirects to redirect the traffic to the appropriate page on the main domain. I would NOT use canonical tags in this case.