Don’t go for clay telecom, they are the biggest frauds one can come across believe me. I have taken their international sim-card and they billed me over and above the call plan and after so many follow ups didn’t reverted a single paise.
Their sim card didn’t worked for 9 days of my 15 days of travel and still they charged me with more than 15 days of rental, depending on their will.
Also they block your credit card for an above average amount and then don’t release it after generating your bill, such that your money gets trapped with them.
Worst thing, when you follow up with them there customer care will only fool you and actually don’t do anything. They are the biggest cheaters, I have ever seen with frauds working in their company.