Traffic upload/download continuously (Bolod 9700)

Phone : Bold 9700
OS : V6.0.0.723

i see this phone upload and download some data traffic continuously. then, i remove all mail accounts and all 3rd party application including BMM and FB. now there are only OS and it's major components. further, a free application call "Network traffic controller" was installed. i can still see it's uploading and downloading something (2 -arrows at top right Conner blinking ), within "Network traffic controller" it clearly show in & out traffic counters go up.

please tell me how can i find who (application name) does upload and download traffic ? is there a tool to do it ? or workaround to fix this issue