SET UNREACHABLE IN AIRTEL!

If U want to Set UNREACHABLE' or 'OUT OF COVERAGE AREA' in your Airtel Using Mobile diverting option.

Then go to Settings->Call Settings Then select call divert option then activate other number then type that column Remove ur last number and put it.

*First Keep More Than 1 rupee in Your Mobile

Eg > your number is
9895098950
And in divert box enter this 989509895
Remove last number of ur mobile number. It is very use full.