How To Flash Any Number Without Airtime Using Your Airtel Sim
> Go to your phone dialer app
> Type the number there
> Then add ** at the beginning of the number. E.g; **08012345678.
> Lastly, call the number. It will quickly disconnect, and then ring once at the receiver's end.
> Note that your airtime won't be touched even if you have some in your balance.
