A note for LTE/4G Operators, from the eNB, it’s quite easily to hack into EPC nodes. Once got into the S-GW/P-GW nodes, all data can be tapped. Selected important data from EPC nodes can also be collected and embedded into various logs through hidden backdoor code and be sent via the e-UTRAN access.
In the open letter, it mentioned about the army (PLA), but the fact is, in China, the Communist Party of China (CPC) controls everything. PLA is only an apparatus of the CPC. If one ever lived in China, one would know that most political/business deals and decision making process are opaque and shrouded in secrecy mode.
Other interesting links and articles about CPC, Huawei might be worth reading are shown below.
http://www.chinadaily.com.cn/china/2007-07/10/content_6142022.htm“Primary Party organizations are formed in China's mainland enterprises, rural areas, government departments, schools, scientific research institutes, communities, mass organizations, intermediaries, companies of the People's Liberation Army and other basic units, where there are at least three full Party members.”
------<h1 style="margin: auto 0in;">ACG Research on Huawei, Chinese business culture and the Art of War</h1><h1 style="margin: auto 0in;">http://searchtelecom.techtarget.com/feature/ACG-Research-on-Huawei-Chinese-business-culture-and-the-Art-of-War?asrc=EM_USC_13048542&track=NL-854&ad=804294</h1><h1 style="margin: auto 0in;"> </h1><h1 style="margin: auto 0in;">ACG Research on Huawei vs. network equipment vendors </h1><h1 style="margin: auto 0in;">http://searchtelecom.techtarget.com/feature/ACG-Research-on-Huawei-vs-network-equipment-vendors</h1><h1 style="margin: auto 0in;"> </h1>