Will replying a call from 777888999 blast your Mobile ??
No, it won’t.
1. It’s 9 digit which isn’t possible.
2. Yes, the mobiles do blast because of some faulty battery at the time of charge or over heating but a phone call just can’t do it.
3. If it was even a bit true, it would be in mainstream media by now.
Well, it’s improbable that you’d get a call from this number in the first place, so chill.