how do i report a lost cellphone to NTC? do i have to physically go there and fill up a form? how does the NTC know that i'm not just a prank who's just trying to piss off someone by reporting his/her phone was lost and claiming that it was mine?

my mom just lost here cellphone this morning. she thinks she might have dropped it while riding a tricycle.

i already called up globe to disconnect the number. but they can't block the cellphone since the unit was not bought from globe.