Each SIM has an international mobile subscriber identity (IMSI) ...

[lracut11]

Each SIM has an international mobile subscriber identity (IMSI) number that associates the phone with the subscriber's _____________.
 
  Fill in the blank(s) with the appropriate word(s).

Question 2

When working with mobile devices, _______ ________ is probably the most useful source of information available to the investigator.
 
  Fill in the blank(s) with the appropriate word(s).

[ApricotDream]

Answer to Question 1

Answer: mobile network

Answer to Question 2

Answer: web searching