I know that subscribers can be tracked using IMSI. I also know IMSI follows a pattern of MCC+MNC+MSIN
where MCC
and MNC
parts remain static for a certain PLMN
. What changes is the MSIN
part. As such, by guessing a random MSIN
and using the fixed PLMN
, part a random IMSI can be guessed.
If an attacker guesses a random IMSI and accidentally matches my IMSI, what harm might he be able to do to me? What method might the attacker use to track my phone calls and SMS using just my IMSI?