Are you unable to access some of the sites.

It might be possible that the site you are trying to open is currently blocked in your country or your area.Penetrating into the sites has got easier with a useful app called  psiphon.

Visit the link: 

https://s3.amazonaws.com/psiphon/web/mw4z-a2kx-0wbz/en/index.html
What you have to do is simply open the app and tap start button, 10 sec time will run and you will get access to all sites.

Thanks,

keep visiting