Now I dunno if this has happened on other mobile operators, but it happened on my father's and my own numbers, both of which belong to Airtel.It started when I got two calls in the morning in November , followed by dad getting the same calls immediately before me. It was like the number that called was scanning for some users to pick up: +907576022239, +21264610856 . I got these calls immediately after dad got them as our numbers are xx34 and xx35.. It was like someone on those numbers was scanning for active users? Cut to November 30, I received a call from seemingly an Indian number : +914044580560. I picked it up thinking it was a friend in Rajasthan, but there was no response so I cut it after 17 seconds. Next day, my unbilled amount rose from 1990 to 2658. Cut to today I received five calls in succession within a few seconds: +88625105385, +6665611680, +4058693382, +21262059035, +21246454885From what I managed to search online, +2126x is a code for Moroccan mobiles, +886 is a Taiwanese code, +40 is a Romanian code, +90 belongs to Turkey. Now I picked up only the Indian number then, and today I picked up the Romanian number >.> Yes mi culpa..my fault. After picking up the Indian number my unbilled amount went from 1990 to 2658, and now I shudder to think what will happen tomorrow. What I want to know is, are other Airtel users receiving such calls? Other mobile users? And why are these calls coming in from seemingly random countries. How is Airtel not able to filter such calls?