SIP协议中文说明文档，已经制作成chm格式，方便查阅-the instruction of sip protocol in simple Chinese，which is already transformed into chm and easy for you to scan and look for

介紹如何Hack Nokia系列的Smart Phone，對於理解其系統架構相當有幫助 Chapter 1. Get to Know Your Phone Chapter 2. Get Connected Chapter 3. Extend and Enhance Your Phone Chapter 4. Protect Your Phone Chapter 5. Make and Receive Voice Calls Chapter 6. Exchange Dat