Question: how to check airtel 4g data usage by sms?
Answer: Airtel Balance Check – *123#, 2G Data Balance Check – *12310#, 3G Data Balance Check – *12311#, Airtel 4G Balance Check – *1218#, Airtel Night Data Balance – *123197#, Airtel Special Offer – *121#, Airtel Special Offers and Rewards – *566#, Check 2G/3G Data Balance – SMS Data USE to 121.