With the rule that I will say , you can know all the details of any SIM customer , not just your lover . See: First go to Play Store or App Store, search by typing 'Puffin Browser' , download that app. Then open the account with the number that you want to know the details of the SIM in that app . Then ask for the phone number verification code. The code will come to the mobile number of the person whose phone number . সংগ্রহ Collect the code and verify the number. Diameter! Now you can see everything on that number , such as call list , transmission, etc. Note: The phone number verification code belongs to the person whose SIM it is . So considering the future, he may not give her that code. So your special job is to collect that code.