In Airtel prepaid (TN and Chennai) :
For checking balance dial *123#
For checking booster packs validity, dial *124#
For checking local Airtel to Airtel call minutes (at Rs.0.05 per minute) in Rs.97 and in Rs.149 booster packs, dial *125*1#
For checking local sms limit in old Rs.60 recharge (750 sms FREE per day), dial *125*2#
For checking sms limit in new Rs.60 recharge (22000 local sms FREE per month), dial *123*3#
To check free AIRTEL to AIRTEL talk value (during special offer) *123*1#
To know about BOOSTER PACKS, dial 17126.
To know about Rs.69 booster pack, dial 17141. To know about Rs.149 booster pack dial 171149.