Hi friends today i am giving you the USSD codes of all netoworks in india..Enjoy HOW TO USE USSD CODES ? --->> To Use This Codes, First Type This Codes And Then Press CALL Green Button. Aircel USSD Codes - Aircel Customer Care Number - 121 or 123 Your Aircel Number - dial *131# or *1# Balance Check - *125# or BAL to 121 Local Mobile Calls Balance - *111*4# Internet Setting - PI to 121 or ALL to 121 Check GPRS Balance - *126*4# or *126*1# or *301# 3G Activation - START 3G to 121 Switch Off - *21*904# DND Service - DND to 1909 Rate Cutter - 1215 or *122# e-Recharge - *124*(your aircel number)# Value Added Service - 1214 IMIS no - *222# or *2# or *214# Aircel free 3G Service - *122*5*1# or *122*456# ( 6 am to 9 am IST till 15th May) Aircel Free Hellotune - UL to 5800000 ( not confimed ) Free Sms Message Center No - +919808932698 or +91905063222 or +919050563221 Balance Transfer - *122*666# Airtel USSD Codes - Airtel Customer Care Number - 121 Airtel Vouch