Unblockr now has an Android app for DNS and VPN which can be found within Playstore and also amazon store. No need to adjust network connections.
On the next screen tap WI-FI
Tap and Hold your Wi-Fi network to open the Advanced Wi-Fi settings.
Then tap Advanced Settings.
Now check the box “Show Advanced Settings.” Tap the IP Settings drop-down and change DHCP to Static.
With IP settings set to Static, scroll down and overwrite your IP and Gateway (if you don't then the save option at end will be greyed out)
Enter your Unblockr Country's DNS address.
This is the upto date DNS list.
UK DNS1 = 188.8.131.52
UK DNS2 = 184.108.40.206
USA DNS1 = 220.127.116.11
USA DNS2 = 18.104.22.168
Canada DNS1 = 22.214.171.124
Canada DNS2 = 126.96.36.199