Around 3 to 5 years I’m using the airtel sim the purchase moment or after 2 years I have to get it’s benefits but the recent years I’m not capable due to its network problems that is the internet are very very slow and not reloadable . But their help line 24×7 and their offers are so much they are mainly focus call offer and sms before but the coming of jio they are focused on the internet . After the jio the airtel sim can going to down in the internet users cases