Unlimited Plans Activation From Main Balance ( Airtel , Idea , Vodafone , BSNL )

1) Airtel

Dial * 121# or * 121 * 51# check your best offer . You can activate any unlimited plan which is showing in best offer .
you can activate regular unlimited plan by selecting UNLIMITED PLAN option .

2) Idea

*121# You can activate unlimited plan from best offer section . Just press 1 to activate required plan .

*369*amount# or "150*amount# ( circles specific ) .

3) Vodafone

*111# select best offer section & Activate plan which showing in your best offer .

*444*amount#

4) BSNL

*444# activate selected Data / combo / unlimited plan by pressing 1 after selecting offer .

PS- I know many smart dimmers know above code / process to activate plans . But , there are many other don’t know about this .