(ASK) How to change Primary DNS and Secondary DNS setting, but still obtain IP address automatically

Guys,
on my notebook OS: Windows 7, I have to set Alternate DNS Server with 8.8.4.4, Preferred DNS Server with 8.8.8.8, and leave IP Adresss with "Obtain an IP address automatically" in my IPv4 Setting in order to be able to connect internet service with my wifi router...

But, How to set it in Blackberry phone?
Since if we uncheck "Automatically obtain IP address and DNS", it needs IP Address, Subnet mask, Default gateway address, and something I've never heard:domain suffix values also...

Thanks in advance :)