Free Recharge trick for Airtel Reliance Vodafone

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for the tricks :
Vodafone :
>Purchase 5 continus
rechrge coupons.
>Add 1654 to 1st one &
1653 for 2nd one.
>Do this for 5 cards &
get 2 time recharge value.

Airtel : Add 1027 and multiply
by 3 to used recharge
cards ending with 63 and neglect last few
digits to get double
recharge.

Reliance : Use recharge coupons
starting number
98 ,add 9687 or
multiples and neglect
carry