Caller: an Erica from "MTT"

This call came through my work phone call and Erica asked for a colleague of mine, which got me suspicious and questioned her how she got my number and she said my colleague called her from my (virtual) office number regarding an "IT solution". I requested her number and name and told her I will pass on to my colleague. When I questioned again how she can possibly have my number, she told me my voice was cutting out then she hung up. Later my colleague told me he's never heard of her or MTT. Scam.