How to configure SIP settings on Nimbuzz:

Step 1:
1.	Open Nimbuzz
2.	Go to Options
3.	Go to  Settings
4.	Go to SIP providers
5.	Go to other
?	Username
<Globecall User Name>@IP adress
?	Password
(Globecall Password>
?	Proxy server
sip.globecall.us
   6. Save
   7. Ok 

Step 2:
1.	Go to Options
2.	Go to Settings
3.	Go to VoIP provider settings
?	Change VoIP Provider to SIP
You can see three options
o	NimbuzzOut
o	SIP
o	SkypeOut
4.	Select SIP
5.	Press ok
That.s all
How to make call:
1.	Go to Call options by pressing right navigation key (I use Nokia N73).
2.	Go to Options
3.	Dial a number
Note: you can select contact numbers that are stored in your mobile phone. But make sure you have route for that dialing pattern.