Caller ID and tracking number

 Just a simple lab conversation

Han: Olga...
Olga: yes?... (and smile)
Han: (smile back and say nothing)
Olga: why do you say 'Olga'?
Han: har? ..Because that is your name!
Olga & Han:  LOL

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The most useful GPS tracking number is now mobile no.
That i can ensure my loved one is safe and sound, gives me the real time update in text or in sound. How nice!