JTAGing Mobile Phones
In this article Patrick Olsen describes the process of JTAGing mobile phones for forensic purposes. He starts from the definition of JTAG, then talks about interface signals. He presents a very useful list of tools you’ll need to perform such data extraction (with links). And he finishes with explanation of JTAGing process of Nokia Lumia 521.
Here is the link to the article.