DF-BluetoothV3 Arduino Mega project

Good day everyone!

I am developing project where I need to scan and define cell phone via bluetooth module. Scenario: arduino mega with bluetooth module, i bring my nokia phone to blutooth module, it defines nokia phone bluetooth mac address.
Does anyone know how it can be implemented?
I read about sending AT commands to bluetooth module, can someone show how this can be done(arduino code example)?

I am developing project where I need to scan and define cell phone via bluetooth module.

A specific phone?

Mobile phone Nokia 6120.

So you are trying to detect when your phone comes in range of your bluetooth device?

it defines nokia phone bluetooth mac address.

I don't understand this. Your phone already has a mac address. Why do you need to define it? Did you mean detect?

Yes, sorry.
I mean to detect my mobile phone with bluetoth module.