Airtel sim card in my wife mobile dont provide good network and voice clearity.any time I cant talk properly in airtel user due in sufficient network signal.
Sometimes network gone without any resion I informed many times to customer service for network problem but I cant get good service for that and replied to me that problem in your phone but in other sim there is nothing problem as I tried for other cellular sim card working properly.also the customer service by airtel is not as good as vodafone or idea.