I have used second sim airtel sim and by using so many speed of internet of airtel I finish my school work so I want to say thanks to airtel. Airtel provide so many offers for using internet and plus which are plus points of airtel.Sometime during the time journey coverage problem can be seen but many good features remove this problem easily.Airtel provide so many fasilities to do recharges and it also provide so many shops to pay bill.Just I can say about airtel that airtel make you happy by giving good service to customers.