^I have heard horror stories of people getting a lakh rupees of bill after using their 3G connections 😀
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My uncle who is almost 70, was called up by Aircel guys who said "Sir, you are having 2G connection, we will give you a free upgrade to 3G - at no extra charges" .. My uncle gladly obliged on hearing the word free upgrade.. Fortunately for him, he happened to mention it to me, a couple of days to a week later.. & I called up & blasted the CC on his behalf ... And had it unsubscribed... The damage? He was a casual user, hence he paid only 175-200 for some casual browsing + the original prorated 2G rates of Rs.98/month for that many specified days - instead of just Rs.98 for 2G unlimited
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Luckily, he did not get a taste watching youtube etc on 3G... otherwise without realizing, it would have given him a huge shock later...