I have taken a airtel connection in my mobile from poarting from Vodafone 2 yrs ago now I n enjoying 4 g service in my phone.i have been given 200 talktime free for first six month bcaz of my potability.my connection on my phone is smooth I n able to connect my net very fast and also my plan is unlimited plan.If I exhaust my 500mb net in my given one month time my net still will be working at the speed of 3 G without any extra charges that the amazing part of airtel services.i m very happy and satisfy with my airtel connection.