most of the new smart phones shows the exact time n date(like computer) if battery is removed for sometime(few minutes).. can you tell me how is that happening?
@jhungary sir need your input on this thing..
Which one do you want me to comment? On the PAK Intelligence Front or On the Removing the Battery bits?
First of all, Pakistani Intelligence could not pull out something on the scale of what the NSA did in America (aka the "PRISM") While they can of course track people location and tap into landlines and cellphones, problem is how do you process those data?
There are 200 millions people in Pakistan, and while not everyone have a cell phone or use a cell phone and or land line all the time, you are still talking about hundred of thousand of hours of phone call, e-mail log, location to be processed everyday (That represent a 0.1% of all Pakistani talk on the phone for 1 hour a day). And on an average scale, it will take 6 hours for a team of 50 to sip thru 300 hours of phone call and then you have to also put in
What NSA do is that they will use a keystroke log and keyword search, which means all these phone call, e-mail, video message will be pass thru to a supercomputer and filter thru the system and then generate an automatic response. For which the supercomputer would have to perform Keyword Search, Voice Search and Facial Recognition on all the raw data and turn them into information, and then you pass it on to a team of dedicated intelligence officer and determine the value of the information.
For that to work, you will need a budget in the billions and advance equipment to do that, which not many country in the world can actually pull this off.
About phones, you can still track any phone for a limit period of time even after you remove the battery or the battery is dead. The same reason why your phone did not lose anything store in your RAM is because they have a small mercury battery powering the Phone CPU after you remove your battery or your battery is dead.
Another method not related to the battery is called "Passive Triangulation" which basically act as a locator of your signal even after your phone not transmitting any, but rather by nearby device try to actively ping your phone (like Wifi, Bluetooth or Infrared Port). Even if your phone is not responding people can still know your location if you carry a dead phone around simply by hacking into nearby active device.
