I am not james bond. but the fact is it does buzz. I think there is an inherent problem with mobiles (anyone)
Between the wife and myself, over a period of time, say 10 years we have owned about 40 different handphones, for her 5 different model Nokias, 1 Moto Razor and 8 different models of Siemens. For me, 1 Moto Razor, 1 Ericsson, 4 Nokias and 20 different Siemens (all appx). And neither of us have had this problem with any of our phones of just vibrating when it wanted too. I would go with the tracking by the Chinese govt that was put forth.