Wouldn't wireshak plus ANY UA be the answer ? 
Am 07.09.2011 um 10:10 schrieb jcgpoza gonzalez:

Why don't you use SIPp?

http://sipp.sourceforge.net/

really useful tool.

2011/9/6 Yungwei Chen <yungwei@resolvity.com>
Hi,

I'm wondering if there's a SIP client that can display arbibrary SIP headers on its UI. Thanks.


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