I was wondering how carriers could track your calls and phone. I know that that there are a few things that are sent to the cell towers (and then to the carrier if it is logging the information) when making a call.
Correct me if I am wrong.
I think that it must must be the number, IMEI (to identify the phone) and location of the cell tower which handles the connection to the phone (other possible data is also the number to which the phone is calling and the date and time of the call).
Are there any more things that are being sent like for instance, phone model SIM card information or something that I am not aware of?